Class 7 Nso 5 Year

ebook

NATIONAL NATIONAL SCIENCE SCIENC E OLYMPIAD OLYMPIAD

CLASS

5

Years (2014-2018) Solved Papers

INSTANT

7

Copyright © 2019 Science Olympiad Foundation. Printed with the permission of Science Olympiad Foundation. No part of this publication may be reproduced, transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior permission of the copyright holder. Ownership of an ebook does not give the possessor the ebook copyright. All disputes subject to Delhi jurisdiction only.

Disclaimer : The information provided in this book is to give you the path to success but it does not guarantee 100% success as the strategy is completely co mpletely dependent on its exec ution and, it is based on previous years' pape rs of NSO exam.

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CLASS 7

Contents Â

NSO 2014 - SET A

Â

NSO 2014 - SET B

Â

NSO 2015 - SET 1

Â

NSO 2015 - SET 2

Â

NSO 2016 - SET A

Â

NSO 2016 - SET B

Â

NSO 2017 - SET A

Â

NSO 2017 - SET B

Â

NSO 2018 - SET A

Â

NSO 2018 - SET B

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Learning English

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Learning Science

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Reasoning


Learning English

Learning Grammar





Learning Computers

Learning & Knowing


Learning Science

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Reasoning


Learning English

Learning Grammar





Learning Computers

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Learning Science

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Set A Year 2014

17th NSO - SET A

2

LOGICAL REASONING

1.

Four Four frien friends ds M, N, O and and P are playin playing g card cards. s. If P faces towards North and M faces towards West, then A. B. C. D.

2.

3.

4.

who faces towards South? O N P Data inadequate

Pointi Pointing ng tow toward ardss a man, man, Radhi Radhika ka said said,, "His "His sist sister er is my daughter's brother's mother." How is the man related to Radhika? A. Brother B. Father C. Uncle D. Grandfather Select Select the option option which which will will repla replace ce the the que questi stion on mark in the given number series. 198, 194, 185, 169, ? A. 92 B. 112 C. 136 D. 144

C. D.

R, S S, Q

7.

If the the digit digitss of a watch watch are are rep replac laced ed by by every every altern alternate ate letter in alphabets starting from 12, in the reverse order, i.e. 12 is replaced by A, 11 is replaced by C and so on, then at which letter would be the hour hand when it is 5:00 pm? A. P B. N C. O D. Q

8.

C ou ou nt nt t he he n um um be be r of of r ec ec ta ta ng ng le le s in in t he he g iv iv en en gure.

9.

A.

20

B.

18

C.

16

D.

14

Find Find the the mirror mirror image image of the given given Figure Figure (X), (X), if if the mirror is placed vertically to the left.

Which Which of of the follow following ing Venn diagra diagrams ms repr repres esen ents ts the the best relat ionsh ip amongst amon gst "Men, Trees and Livi ng beings"? bein gs"? A.

Figure (X)

B.

C.

A.

B.

C.

D.

D. 10. Arrange Arrange the the given given units units in a meani meaningfu ngfull sequenc sequence. e.

5.

1. Hecto 5. Deci

Which Which of the the follow following ing num number berss will will compl complet etee the the given gure? A.

90

1 9

B.

97

C.

107

D.

117

17 129 ? 33 73 49

A. B. C. D. 11.

6.

Select Select a pair pair of of gure guress from from the the option optionss whic which h has has

same condition of placement of dots.

1, 1, 2, 5,

3, 5, 5, 2,

2. Centi 4, 3, 3, 1,

5, 4, 1, 4,

3. Deca

2 2 4 3

Two positio positions ns of of a dice dice are are given given below below.. Find Find the number at the bottom, when number 6 is at the top.

3 6 (P) A. B.

P, Q Q, R

(Q)

(R)

(S)

(T)

4. Kilo

A. B. C. D.

4 2

5

1 4 5 Can't be determined

1 1

3

2

17th NSO - SET A

3

12.

121 is related to 12 in the same way as 25 is related to _____. A. 1 B. 2 C. 6 D. 7

13.

A bird shooter was asked how many birds he had in his bag. He replied that there were all sparrows but six, all pigeo ns but six, and all ducks but six. How A. B. C. D.

3 D % 7 A. B. C. D. 15.

6 $ C 4 E 8 # N 5 F 1AP H U A 1 F %

9

M @ K 2 B

Which of the following options will complete the pattern patt ern in Figure Figu re (X)? A.

many birds did he have in all in his bag? 9 18 27 36

B.

? Figure (X)

C. 14.

Which of the following is exactly in the middle of the 17 th from the right end, and 18 th from the left end, in the given arrangement?

D.

SCIENCE

16.

A. B.

A ray of light parallel to the oor strikes a plane

mirror, which is inclined at an angle 40° as shown in gure. What is the angle of reection? A.

40°

B.

80°

C.

50°

D.

90°

Incident ray

Plane mirror

40°

When you heat a system, its temperature _____. A. Always increases B. Sometimes decreases C. May stay the same D. Always goes up or down, depending on the heat

18.

Two boys, P and Q are running along the same path. P is 10 m ahead of Q initially. However, Q catches up with P, after running 50 m. Assuming that both boys are running runn ing at a const ant speed, speed , what is the ratio of the speeds of P and Q?

19.

6 5 4 4

: : : :

5 6 1 5

The given gure shows a circuit which contains two identical lamps. When the switch is closed, which of the following statements best describes, what happened to lamps P and Q ?

20.

Floor

17.

A. B. C. D.

C. D.

P Q

Two magnets, P and Q attract four soft iron bars, W , X , Y and Z at their poles, as shown in the given gure. What will happen to the iron bars, when the two magnets move towards each other, and attract each other?

A. B. C. D. 21.

P is brighter than before, but Q does not light up. P does not light up, but Q is brighter than before. Both P and Q are brighter than before. P and Q both will not light up.

Nothing will happen. and Y will will drop off. X and and Y will will repel away each other. X and and Z will will attract X and and Y respectively. W and

A laboratory thermometer gave the reading of –1°C and 99°C when inserted into melting ice and boiling water respectively, both at standard atmospheric pressure. What is the error when the same thermometer thermomet er is used to measure the difference between two arbitrary temperatures? A. –1°C B. 1°C C. 0°C D. 2°C

17th NSO - SET A

4

22. Metal Metal pots pots are often often made made shiny shiny on surfac surfacee outside outside especially on the top and side and that makes sense thermally because because this ______. A. Conducts heat better B. Radiates less energy out from the pot C. Lowers the loss due to conduction D. Appreciably decreases convection losses 23. Komal Komal and and Kavita Kavita star startt at one one end of of a street street (the (the origin), run to the other end, and then head back. On the way back, Komal is ahead of Kavita. Which of the given statements is correct, regarding the distance covered and the displacement from the origin at the moment? A. Kavita has run a greater distance, but her displacement is less than that of Komal. B. Kavita has run a greater distance and her displacement is greater than that of Komal. C. Komal has run a greater distance, but her displacement is less than that of Kavita. D. Komal has run a greater distance and her displacement is greater than that of Kavita. 24. During During the the formati formation on of rain, rain, when when water water vapou vapours rs change back to liquid in the form of rain drops, _____. ____ _. A. Heat is absorbed B. Heat is released C. Heat is rst absorbed, and then released D. There is no exchange of heat 2 5.

O b s e rv r v e t he he f o ll l l o w i n g e x p e r im i m e n t al a l s et et - u p carefully. Ice cubes Beaker

Aluminium tray

Sea water

A. B. C. D.

27. Reyansh Reyansh placed placed three three different different type typess of glas glasse sess in front of letters as shown below : W W

A. B. C. D.

Y

Z

Sea water Water Sea water Water

Sugar Salt Salt Salt

Sedimentation and decantation Evaporation and ltration Condensation and evaporation Evaporation and condensation

X

I

II

C. D.

Read Read the given given stat statemen ements ts and and select select the the correct correct option. Statement 1: Acid rain causes damage to buildings, historical monuments, plants and animals. Statement 2: Air pollutants such as carbon dioxide, sulphur dioxide and nitrogen dioxide dissolve in rain drops to form carbonic acid, sulphuric acid and nitric acid respectively.

III

Glass II is opaque and frosted. Glass III is translucent and frosted.

28. Preeti Preeti has has collec collected ted some some items items from her kitch kitchen en : i. ii. Baking so soda Amla iii. Tamarind iv. Soap v. Lime water vi. Common salt vii. Sugar She classied them as acidic, basic and neutral substances. Which of the following classication is correct? Acidic

A. B. C. D.

(i), (ii) (iv), (vi) (i), (iii) (i), (iii)

Basic

(iv), (vii) (i), (ii), (iii) (ii), (v), (vi) (ii), (iv), (v)

Neutral

(iii), (v), (vi) (v), (vii) (iv), (vii) (vi), (vii)

29. A science science teache teacherr arranged arranged the follow following ing sets sets of of test tubes and added different indicators to the solutions. 10 mL Sodium hydroxide + 5 mL Spinach juice

10 mL Nitric acid + 5 mL Window cleaner (1)

15 mL Potassium hydroxide + 10 mL Vinegar

(2) 1 teaspoon Curd + 10 mL Lemon juice

(3)

26. 26.

R

Which of the following observations is correct? A. Glass I is transparent and unclear. B. Glass I is translucent and clear.

Test tube Tripod stand Burner Identify liquid ( X ) in the test tube, residue ( Y ) left in the beaker, process ( Z ) involved. X

Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. Statement 1 is true and statement 2 is false. Both statements 1 and 2 are false.

(4)

She asked the students to nd out the incorrect result

from the following. A. B. C. D.

Test Test tubes 1 and 3 turn turmeric solution to red. Test tubes 2 and 4 turn China rose indicator to green. Methyl orange turns yellow in test tubes 1 and 3. Phenolphthalein remains colourless in test tubes 2 and 4.

17th NSO - SET A

5

30. Some example exampless of changes changes are given given below below : a. Cutt Cuttin ing g a log log of of woo wood d int into o pie piece ces. s. b. Breaking down of ozone. c. Melting of glaciers. d. Lime Lime wate waterr turn turnss milk milky y. e. Digestion of food. f. Punc Punchi hing ng a hole hole in a pape paperr. Classify the above changes into I. Irreversible physical change I I. Chemical ch change III. III. Reve Revers rsib ible le phy physi sica call chan change ge A. I - a, f II - b, d, e III - c B. I - a, b, e II - d, f III - c C. I-a II - b, d III - c, e, f D. I - f II - c, e III - a, b, d

33. 33.

A. B.

31. 50 mL of water water at at 25°C 25°C was was poured poured into each of the three containers as shown in the given gure. The containers were then left in a closed room.

(I)

( I I)

(III)

Which of the following graphs correctly shows the volume of water in each container after ve hours? I II III

r te a w

A. f o

r et a

I

w

B. f

o

II

lu

m

e

III

e

o

m lu o Time

Time

r r

I

et et a w

C.

I

m

e

o

f

III

o

II

lu V

Time

a w

II

o

III

D. f e m

C.

Water table Lake

D.

Aquifer

(i) o Time

32. Which Which of the the followin following g stateme statements nts is/ar is/aree true true (T) or or false (F) regarding nutrition in organisms? (i) Photosynthesis also occurs in leaves having colour other than green. (ii) The process process of photosynthesis photosynthesis rst produces a simple carbohydrate called glucose which then gets converted into a complex carbohydrate called starch. (iii) Cuscuta is a yellow-coloured plant but it can synthesize its own food by photosynthesis. (iv) In a symbiotic association, Rhizobi bact eria Rhi zobi um bacteria derive their nutrition from fungus. (i) (ii) (iii) (iv) A. F T T T B. T T T F C. F F F T D. T T F F

Q Permeable rocks Soil

Permeable rocks Soil

R Soil

S Aquifer

Permeable rocks Soil

Aquifer

Permeable rocks

Water table Water table

The (i) ies from its native place in Russia to places like (ii) in Rajasthan and (iii) in Haryana during a particul part icular ar season. seaso n. It stays in India Indi a for a few months mont hs and then goes back in (iv) season. The general name given to birds like these is (v) birds. Select the correct sequence of words to ll up the blanks blan ks in the above passage. passa ge.

ul V

P Sea

Direction : Read the given passage carefully and answer Q. No. 34 and 35. The phenomenon in which a bird or other animal moves from one place to another in one season, and returns again in a different season is called migration. It is an adaptation to escape the harsh conditions of their normal habitat so as to survive. 3 4.

V V

Read Read the the giv given en pas passa sage ge.. The water-bearing layer of the earth called P is made up of two components Q and R . The top level of layer P is called S . When too many tubewells are used in an area, the level of S in that area goes down. Select the correct sequence of words to ll up the blanks blan ks in the above passage. passa ge.

A. B.

Toucan

(ii)

(iii)

(iv)

(v)

Sultanpur Bharatpur Autumn Adaptatory

Siberian Bharatpur Sultanpur Winter crane

Migratory

C.

Arctic tern

Migratory

D.

Siberian Sultanpur Bharatpur Summer Adaptatory crane

Bharatpur Sultanpur Spring

35. Which Which of the the followi following ng is the proba probable ble metho method d these these migratory birds use to travel to the same place year after year? A.

They have built-in sense of direction and probably use land-marks to guide themselves.

B.

They are guided by the position of the sun during the day and by the position of stars at night.

C.

They use the magnetic eld of earth to nd the direction so as to reach the same place. All of these

D.

17th NSO - SET A

6

36. A teac teacher her showed showed the the followi following ng plants plants to stude students nts and and asked them to write their methods of reproduction.

W

X

Y

Z

Given below are answers written by the students : Student P : W , X and Y propagate vegetatively through stem. Student Q : W and and X are are rhizomes which propagate vegetatively through roots. Student R : Z is called bulbil which propagates vegetatively through stem. Student S : Y vegetatively propagates through roots. Which student(s) wrote the correct answer? A. Students P and S B. Only Student S C. Students Q and R D. Only Student Q 37.

Refer Refer to the give given n ow chart chart showi showing ng the char charact acteri eristic sticss P, Q and R which are present in some animals and

39. 39.

Whic Which h of of the the fol follo lowi wing ng statements best describe the organism growing on the given piece of bread? brea d? (i) It belongs to owering plants. (ii) It reproduces by spores. (iii) It is a chlorophyllous organism. (iv) It prepares its own food. (v) (v) It obtains food from dead and decaying organic matter. A. (ii), (iii) and (iv) B. (i), (ii) and (v) C. (ii) and (v) D. (iii) and (iv)

40. The given given diagra diagram m show showss bloo blood d circulation pathway in the heart. P Which of the following correctly shows the relative amount of oxygen and carbon dioxide at P, Q, R and S ? More CO2

A. B. C. D 41.

R Q and R S P and Q

Q

R S

More O2

P, Q, S P and S R R and S

Which Which of the follo following wing stat stateme ements nts are are correct correct regar regarding ding the given animals?

absent in others.

(i) Identify P, Q, R and P A. Diaphragm B. Throat C. Lungs D. Diaphragm

select the correct option. Q R Book lungs Operculum Spiracles Book lungs Book lungs Spiracles Operculum Spiracles

38. Match Match column column I with with column column II II and selec selectt the corre correct ct option from the codes given below. Column - I Column - II (a) Clothing material (i) Nylon (b) Twisted bre (i i) F ab ri c ( c) Sy nt het ic  br e (iii) Yarn ( d) Ani mal b r e (i v) Co tt on ( e) Pl ant b r e (v ) S i lk A. (a) - (i), (b) - (ii), (c) - (iii), (d) - (iv), (e) - (v) B. (a) - (ii), (b) - (iii), (c) - (v), (d) - (i), (e) - (iv) C. (a) - (ii), (b) - (iii), (c) - (i), (d) - (v), (e) - (iv) D. (a) - (i), (b) - (iv), (c) - (iii), (d) - (ii), (e) - (v)

(ii) (iii)

(iv) (v) A. B. C. D.

X Y Both X and Y possess streamlined body and webbed feet. Both are good swimmers. has a thick layer of fat under its skin with fur Y has on its body, while X has thick skin and a layer of fat under its skin. Both live together in large numbers and huddle together to keep themselves warm. has very strong sense of smell unlike X . Y has (ii), (iii) and (iv) (i), (ii), (iii) and (iv) (ii), (iii) and (v) (i) and (iv)

42. Jayesh Jayesh placed placed 3 potted potted plants plants in an airtig airtight ht glass glass tank tank as shown in the given diagram. Airtight glass tank

Limewater

17th NSO - SET A

7

If he placed the set-up in a dark cupboard for a few hours, what would happen to the limewater, after a few hours? A. It would turn dark blue. B. There would be slightly less limewater left. C. It would turn milky. D. There would be no change. 43.

P – meat, sh, eggs Q – butter, ghee, margarine R – bread, biscuits, potatoes S – amla, tomato, orange Select the incorrect statement regarding them. A. Deciency of P causes Marasmus in children and Kwashiorkor only in adults. B. Amongst P, Q, R and S , 1 gram of Q produces the maximum energy. C. Excess of R gets stored in body cells, and is used for production of energy, whenever required. leads to a disease, in which gums D. Deciency of S leads swell up and bleed.

Refer Refer to the given given gures gures and and answer answer the quest question ion that follows. Z Y X

4 5.

What are the main functions of X , Y and and Z ? X

A. B. C. D.

Supports the plant Transports water and minerals Transports water and minerals Transports Transport s food

Y

Transports food Transports food Supports the plant Transports Transports water and minerals

Z

Gaseous exchange Release water vapour Take Take in CO2 Gaseous exchange

44. Given Given below below are the the four four food food componen components ts (P - S ) and their corresponding sources.

S t ud ud y th th e gi gi v en en di d i a gr gr a m carefully. A pump containing 3 50 cm of air is connected to the glass jar. The capacity 3 of the jar is 200 cm and it 3 contains 200 cm of air. The plunger is pushed all the way into the pump and all the air from the pump goes into the jar. What will be the volume volu me of air in the jar now? A. B. C. D.

3

250 cm 3 200 cm 3 50 cm Cannot be calculated

Plunger Pump 50 cm3 of air air

Jar 200 200 cm cm3 of air air

A CHIE CHIEVERS VERS SECT SECTION ION

46.

A sh sh sees sees the face face of a scuba scuba dive diverr throug through h a thin thin bubble, as shown in gure. Compared to the face of the diver, the image seen by the sh will be _____.

A. B. C. D.

Smaller and erect Smaller and inverted Larger and erect Cannot predict

47. Fill in in the blank blankss by observ observing ing the the followin following g chemica chemicall process. proc ess.

The above process becomes faster when humidity is and can be prevented by applying a coat of a

b , or by depositing a layer of a metal like

c

on iron. x y z a b c A. Mg O2 MgO low water copper B. Ca CO2 CaCO3 high oil magnesium C. Fe O2 & H2O Fe2O3 high grease chromium D. Fe H2O & O2 FeO low paint zinc 48. A leaf litter litter communi community ty has has woodlic woodlicee as primary primary consumers and centipedes and millipedes as secondary consumers. The given graph shows the changes in the population of woodlice over a period of time. Which of the following is the incorrect possibility, as per given graph?

17th NSO - SET A

A.

The number of centipedes in the habitat increases at point X . There is an increase in the quantity of dead leaves in the habitat at point Z . The number of millipedes in the habitat decreases at point X . There is a shortage in the quantity of dead leaves in the habitat at point X .

B. C. D.

49.

8

Z

X U

W

(iv) X and Z show pollination that will result in fruit formation. (v) W , X and Y show cross pollination. Which of the given statements are true or false? A. (i) and (iv) are true; (ii), (iii) and (v) are false. B. Only (v) is true; rest are false. C. (i), (ii), (iii) and (v) are true; (iv) alone is false. D. (i), (ii) and (v) are false; (iii) and (iv) are are true. 50. Refer Refer to the the given given graph graph which which shows shows the effect effect of of pH on the activiti acti vities es of three thre e enzym es, X , Y and Z .

Y

X

n

Y

Z

oi t c a er f o

The given gure shows the longitudinal section of te a R

two owers of the same type. Study the following statements with reference to the given gure.

(i) Z and and U show show self pollination, whereas Y shows shows cross pollination. (ii) W , X and Z show transfer of pollen grains that will result in fruit formation. (iii) Z shows self pollination, while X shows cross polli nation. nati on.

2

4

6

8

10

12 12

pH

The three enzyme samples, X , Y and Z are taken from which parts of the human alimentary canal? X Y Z A. Duodenum Mouth Stomach B. Mouth Stomach Duodenum C. Stomach Duodenum Mouth D. Stomach Mouth Duodenum

SPACE SPACE FOR ROUGH WORK

Class 7

Set B Year 2014

17th NSO - SET B

2

LOGICAL REASONING

1.

W hi h i ch c h w ou ou ld l d b e t he h e a sc s c en e n di d i ng n g o rd rd er e r o f th th e

6.

following? 1.

Trillion

2.

Thousand

3.

Billion

4.

Hundred

5.

Million

A.

1, 2, 3, 4, 5

B.

1, 5, 3, 2, 4

C.

4, 2, 3, 5, 1

D.

4, 2, 5, 3, 1

Selec Selectt a gur guree from from the the opti options ons,, which which when when plac placed ed in the blank space of Fig. (X) would complete the pattern. patt ern. A.

?

B. 2.

If the the days days of the the wee week k are are repla replaced ced by eve every ry alte alterna rnate te Fig. (X)

letter of the English alphabet, with Wednesday replaced by E, Thursday by G and so on, then fth

C.

day beginning from Friday will be shown by which of the following ?

3.

A.

E

B.

I

C.

O

D.

Q

D.

A set set of of gure guress carry carrying ing certa certain in cha charac racte ters rs is given given..

7.

Assuming that the characters in each set follows a

Study Study the the Venn diagra diagram m caref carefull ully y and and answe answerr the the question given below.

similar pattern, nd the missing character.

Employed people 8

6

3 4

4.

15

1

5

15

5 6

1

7

? 9

4

A.

5

B.

6

C.

4

D.

3

7

and hence form a group. Which is the one that does 8.

5.

A.

1331

B.

2197

C.

3375

D.

4913

3 6

17

5

Backward people

7

Educated people

Which region represents the backward uneducated people peop le thos e are employed? empl oyed? A. 14 B. 5 C. 7 D. 11

Three Three of of the the follo followin wing g four four are are alik alikee in a certa certain in way way not belong to that group?

11

Find Find the the mirro mirrorr imag imagee of the Fig. Fig. (X), (X), if if the the mirro mirror r is placed vertically to the right. A.

Ashu, Ashu, Bind Bindu u and and Sonu Sonu are are sta standi nding ng at at the the corne corners rs of of an equilateral triangle as shown in gure. They all

Fig. (X)

run along the sides in clockwise direction and stops

B.

after covering 1½ sides. Now which of the following statements is true? C.

Ashu

N

D. E

W

Bindu

S

S onu

A.

Bindu is to the west of Sonu.

B.

Ashu is to the south-east of Bindu.

C.

Ashu is to the south-west of Sonu.

D.

Sonu is to the north-west of Ashu.

9.

A man, man, point pointing ing to a photog photograp raph, h, say says, s, "The "The lady lady in the photograph is my nephew's maternal grand mother." How is the lady in the photograph related to the man's sister who has no other sister? A. Sister-in-law B. Mother-in-law C. Mother D. Data inadequate

17th NSO - SET B

3

14.

10. How many many cube cubess are there there in the pile? pile?

Which of the the following following gures gures will will conti continue nue the given series?

11. 11.

A.

95

B.

114

C.

100

D.

115

?

A.

B.

C.

D.

At the the end of a busine business ss confe conferen rence, ce, all all the the ten peopl e present pres ent shake hands with each other othe r once. How many handshakes will there be altogether? A. 20 B. 45 C. 55 D. 90

12.

If the the alphabe alphabets ts are are written written in reverse reverse order order after after interchanging alphabets from 'C to M' with those

15.

Select Select a gure gure from from the options options in in which which Fig. (X) is exactly embedded as one of its part.

from 'P to Z' respectively, which letter would be midway between E and S in the new order ? A. Z B. Y C.

N

D.

X

Fig. (X)

13. How many many tria triangl ngles es are are ther theree in the given gure? A.

21

B.

23

C.

25

D.

22

A.

B.

C.

D.

SCIENCE

16. 16.

The The diag diagra ram m show showss the velocity against

18.

The given given diagram diagram shows shows a series series of images images of a moving ball captured by a camera.

time graph for

15 m

the motion of a body. What is its

Direction of moving ball

displacement in the rst 5 s?

17.

A.

11 m

B.

13 m

C.

7.5 m

D.

9m

The melti melting ng point point of of a substa substance nce is 125°C, 125°C, and its its boiling boil ing point poin t is i s 305°C 3 05°C.. At 1 05°C, the subs tance is in the ________ . A.

Solid state

B.

Liquid state

C.

Gaseous state

D.

Solid and liquid state

The ball was moving at a constant velocity and the images were taken at a constant rate of 10 per second. What is the speed of the ball? A. 30 m s –1 B. 20 m s –1 –1 C. 45 m s D. 15 m s –1 19.

A camera camera makes makes use use of a converg converging ing lens lens to to produce produce an image. If the camera captures a distant object, then which of the following sets of characteristics of image is correct? A. Virtual, inverted, same size B. Real, inverted, diminished C. Real, upright, same size D. Virtual, upright, diminished

17th NSO - SET B

20.

4

Bulb 1 and bulb 2 are connecte connected d in serie seriess as shown shown

25.

in the given gure (i). What will happen to the brightness of these two bulbs when a third

Bulb 1

identical bulb is connected across

Bulb 2

Figure (i)

Some changes changes are classie classied d as given given below below : S. No.

Change

I.

S li li ce ce d a pp pp le le tu tu rn rn in in g







ü

III. Cook Cookin ing g of of veg veget etab able less



ü

IV. IV.

Phot Photos osyn ynth thes esis is

ü



V.

D ev ev el e l op o p in in g p ho h o to to -



ü



ü

brown

bulb 1 as shown show n in the given give n gure (ii)? Bulb 1 A. Brighter B. Brighter C. Dimmer D. Dimmer 21.

II. Bulb 2 Brighter Dimmer Dimmer Brighter

Bulb 1

Bulb 2

Figure (ii)

VI. VI. Crum Crumpl plin ing g of of pap paper er

radius 40 m during morning walk. If he starts at

Which of the above changes are incorrectly

one end of the track and reaches the other end, the

matched?

distance covered and displacement of the man with

22.

Crys Crysta tall llis isat atio ion n of of sug sugar ar

graphic lms

An old old man moves moves along along a semisemi-circ circular ular track track of

respect to the starting point are respectively _____ . A. 120 m, 40 m B. 126 m, 80 m C. 110 m, 60 m D. 50 m, 120 m

Chemical Reversible change change

2 6.

A.

I, II, III and VI

B.

I, III and V

C.

II, IV and VI

D.

All are correct.

O b s e r v e t h e f o l l o wi w i n g e x p e ri r i m e n t al a l s et et - u p carefully.

A spher sphere, e, a cube cube and and a thin thin circular circular plate, plate, all all of same material and same mass, are initially heated to same high temperature. Then the ________ . A. Sphere will cool fastest and cube the slowest B. Plate will cool fastest and sphere the slowest C. Cube will cool fastest and sphere the slowest D. Sphere will cool fastest and plate the slowest

23. 23.

Air Air

Layer of oil (prevents air dissolving in the water)

Dry air

Rusty iron nails

Rohan Rohan blows blows air air with with a straw straw near the opening opening of of another straw which has its other end in a soft drink bottle bott le as shown show n in the given gure. gur e. The level leve l of the

Distilled water

soft drink in the straw rises up as soon as air is blown over its open

Anhydrous calcium chloride (drying agent)

Boiled distilled water

end. Which one of the following best

What conclusion can you draw?

explains the reason for rise in level

A.

Only air (dry) can cause rusting.

of the drink? A. Blowing of air increases pressure over the open end of straw. B. Blowing of air decreases the pressure on the surface of soft drink in the bottle. C. Blowing of air decreases pressure over the open end of straw. D. Blowing of air increases the pressure on the surface of soft drink in the bottle.

B.

Air and water are needed for rusting.

C.

Only water (air free) can cause rusting.

D.

Data is insufcient to conclude anything.

27.

Yash wants wants to prepa prepare re lemonad lemonadee for his his mother mother.. He has no idea about the quantity of water, salt, sugar and lemon to be added. Suddenly, he observes that no more salt or sugar can be dissolved in the amount of water he has taken.

24.

If the the strength strength of the the current current owing owing throug through h a coil coil

Which of the following statements is not correct?

is increased, then which of the following statements

A.

The solution obtained is saturated solution.

B.

Yash can solve his problem by using large quantity

is true regarding it? A. Strength of the magnetic eld decreases. B. Strength of the magnetic eld increases. C. Amount of heat generated due to resistance decreases. D. Strength of the magnetic eld remains constant.

of water. C.

By stirring well, more salt can be dissolved.

D.

Some more sugar can be dissolved in solution by heating.

17th NSO - SET B

28.

5

Study Study the given given owcha owchart rt and and select select the the approp appropriat riatee a. b. c. d. A. B. C. D.

option. Substances Edible Soluble Soli Solid d

Non-edible

Insoluble

Float

Sink

S

T

U

Liqu Liquid id

32.

P

Sweet

Q

R Q

S

U

Glucose Eraser

In the the giv given en reac reacti tion on : ( P ) + CO2 China rose indicator Turns green

(Q)

+

Complete the diagram with correct sequence of events from the following list. a. Sulp Sulphu hurr dio dioxi xide de rise risess int into o the the atmo atmosph spher eree b. Acid rain falls c. Fish Fish die die in in acid acidi ieed la lakes kes d. Disc Discar arde ded d car car batt batter erie iess leak leak acid acid e. Fuel Fuel comb combus usti tion on in powe powerr sta stati tion onss f. Ozon Ozonee is is pro produ duce ced d in in pow power er stat statio ions ns g. Pollu Polluta tant nt comb combin ines es with with wate waterr vap vapou our r A. e, d, a, f, c B. e, a, g, b, c C. d, f, g, b, c D. c, g, f, e, b

(R) (Milky)

Red litmus solution No change in colour

P, Q and R are respectively A. CaCO3 Ca(OH)2 B. Ca(OH) 2 CaCO3 C. Mg(OH)2 H 2O D. Ca(OH) 2 H 2O

30.

The given given diagram diagram was drawn drawn to show show the the sequen sequence ce mistakenly left blank.

Lemon juice Mustard oil Eraser Mustard oil Thermocol Honey balls C. Thermocol Lemon juice Mustard oil Glucose balls D. Honey Glucose Eraser Thermocol balls

29. 29.

Column-II Calamine solution Calcium carbonate Milk of magnesia Vinegar

of events associated with acid rain pollution but was Sour

P

A. B.

Column-I Indigestion (i) Bee sting (ii) Tooth decay (iii) Wasp sting (iv) a-(iii), b-(iv), c-(ii), d-(i) a-(iii), b-(i), c-(ii), d-(iv) a-(i), b-(iii), c-(iv), d-(ii) a-(iv), b-(i), c-(iii), d-(ii)

H2O H2O MgO CaCO3

33.

Siddhi Siddhi put put a balsa balsam m plant plant in a beaker beaker of black black ink ink as shown below. After 3 days, she cut open a section

Kritika Kritika set-up set-up the experim experiment ent as as shown shown in the diagram. diagram. She took three identical containers with ice and left them at different places.

of the stem of the plant and observed it.

Balsam plant

Lamp

Beaker Black ink solution

Cold water Set-up Set-up A

Floor Set-up B

Set-up C

After 10 minutes, she observed that lowest amount of water was present in A. Set-up A B. Set-up B C. Set-up C D. All set-ups contain equal amount of water. 31. Match Match the problems problems given given in Colum Column-I n-I with with their their remedies in Column-II and mark the correct option from the given codes.

Which one of the following diagrams would she observe?

A.

B.

C.

D.

17th NSO - SET B

34.

6

The given given graph graph shows shows the the percen percentage tage of undige undigested sted carbohydrates, proteins and fats through successive parts part s of the human alimentar alime ntary y canal. canal .

37. Which conditions conditions would result result in the highest highest rate of movement of oxygen from the alveolus into the blood capillaries? Concentration Concentration

Why does the percentage of undigested carbohydrates remain constant in part X ? A. All the starch has been digested and only other carbohydrates remain. B. Protease at part X prevents the salivary amylase from acting on starch. C. The acidic conditions of part X prevent salivary amylase from acting on starch. D. All the carbohydrates have been digested before reaching part X . 35. 35.

38.

Rate of

of oxygen in

of oxygen

blood fow

the alveolus

in blood

in blood

capillary

capillary

A.

Hig h

L ow

F as t

B.

Hig h

L ow

S l ow

C.

L ow

Hi gh

F as t

D.

L ow

Hi gh

S l ow

Fish are are adapte adapted d for swimming swimming and and their their swimm swimming ing speed depends on several factors such as shape of the ns, body etc. Keeping this in mind, arrange the following sh in order, starting from the fastest swimmer to the slowest.

Hib isc us plant The The rate rate of of wate waterr upta uptake ke by by a Hibisc pla nt kept kep t outdoors was recorded over a few days. The graph below belo w shows show s the results resu lts obtained. obta ined.

P

A. C.

Rate of water uptake

39.

Q

P, Q, R Q, R, P

R

B. D.

P, R, Q Q, P, R

Garima Garima carried carried out a fair test to to nd out the the speed speed with which water passed through four different kinds of soil. She recorded her ndings in the table below.

Midn Midnig ight ht Noon Noon M id id ni ni gh gh t Day 1

No on on Midn Midnig ight ht Noon Noon Midnight Day 2 Day 3

Time

Which of the following does not explain why water uptake was higher at noon than midnight on all the three days? A. Transpiration pull is stronger in high light intensity. B. The rate of transpiration increases with temperature. C. The occurrence of photosynthesis in the guard cells opens the stomata during the daytime. D. Air is generally more humid in day time which increases the transpiration pull.

Kind of soil

P

Q

R

S

Ti m e t a k e n ( s e c o n d s )

33

23

45

18

In which type of soil would you nd the mangrove trees growing in? A. P C. R 40. 40.

B. D

Q S

The The give given n Ven Venn n diag diagra ram m represents characteristics of three gases P, Q and R. In atmosphere, more than 3/4 part of air cons ists ist s of R,

Q

P X Z

Y R

about 1/4 part consists of 36.

Kanika Kanika notice noticed d that her potted potted plant plant was was not growi growing ng healthily. She put three earthwor ms into the pot. After a few weeks, she noticed that her plants looked healthier. What could be the possible reason for this? A. The earthworms ate up the pests in the soil. B. The earthworms helped the plant to take in water. C. The earthworms allowed the plant to make food faster. D. The earthworms increased the air and nutrient content of the soil.

P and a very minor fraction

is composed of Q and other gases. Select the incorrect option regarding the characteristics characteristics of X , Y and Z . A. X – – Support life on earth B. Y – – Inhibit combustion C. Z – – Form compounds that are components of acid rain D. None of these

17th NSO - SET B

7

41.

Which Which of the the followi following ng stateme statements nts suppor support(s) t(s) the the fact fact that the upper surface of a leaf is usually greener than the lower surface? (i) More chlorophyll is present on the upper surface to absorb more light. (ii) There are more stomata present on the upper surface than the lower surface. (iii) More sugar is formed on the lower surface. (iv) The green leaves look greener greener under the hot Sun. A. (i) only B. (ii) and (iii) C. (ii) and (iv) D. (iv) only

42.

Read the follow following ing state statement mentss (i-iv) (i-iv) with with blanks blanks and and select the option that correctly lls the blanks in any two of the statements. (i) The process of unwinding the silk laments from the cocoon and combining them together is called ________. (ii) ________ is removal removal of eece eece from animal. (iii) ________ is the the principle component of of silk. (iv) ________ straightens the woollen bre and also removes residual dirt. A. (i) Reeling, (ii) Sorting B. (ii) Scouring, (iv) Carding C. (iii) Fibroin, (iv) Carding D. (i) Weaving, (iii) Fibroin

43.

for your reference. Select the number of errors in it, including the given error. Cotton is a soft fibre that grows around the fruit of the cotton plant (cottonbolls). After maturing, cottonbolls are burst open, the seeds are then separated from the cotton bres by shearing. This process was earlier done by machines, nowadays done by hands. The raw cotton bres are pulled apart and cleaned to remove all dust and impurities. This process is known as carding. The bre is then cleaned, straightened and made into soft, untwisted fabrics. This process of making fabrics is known as spinning. A yarn is made from two sets of fabrics arranged together. This is done by knitting. A. 4 B. 8 C. 10 D. 5 45.

Match Match column column I with column column II and selec selectt the correct correct option from the codes given below. Column I Column II (Foods) (Major Nutrient present) (a) Cheese, egg, milk 1. Iron (b) Yell Yellow ow or orange orange

2.

Vitamin itamin D

3.

Calc Calciu ium m

4.

Vitam itamin in A

5.

Vitamin C

6.

P r ot ein s

coloured fruits (c) (c)

The oxyge oxygen n cycle cycle is is a delica delicately tely balanced balanced process. process. Which of these, however, can upset this balance? A. Acid rain and ozone depletion B. Deforestation and excessive burning of fuels C. Excessive use of fertilizers and pesticides D. Overpopulation and forestation

(d) (d)

A. B. C. D.

44. The given given passage passage is on the the producti production on of cotton cotton fabric. It has some errors . One of which is highlighted

or vegetables Guav Guava, a, toma tomato to,, citrus fruit Gree Green n leaf leafy y vegetables

a-3; b-2, 5; c-5; d-1, 4 a-3, 6; b- 4; c-5; d-1, 2 a-3, 6; b-1, 2; c-4; d-5 a-4, 5; b-1; c-3, 6; d-2

A CHIE CHIEVERS VERS SECT SECTION ION

Direction (Q. No. 46 and 47) :: Refer to the given experimental set-up to answer the questions.

46. 46.

What What is is the the pur purpo pose se of of ask ask 2? A. To dry the air entering ask 3 for oxygen B. To test the air entering flask 3 for carbon dioxide C. To test whether the gas produced by the insect contains carbon dioxide D. To remove carbon dioxide from the air entering ask 3

47. Which of the the follow following ing statements statements regarding regarding this set-up is not true? A. Any carbon dioxide found in ask 3 is produced by the insect. inse ct. B. Only the solution in ask 4 should show a visible change. C. The insect will die after some time due to the lack of oxygen. D. The purpose of ask 1 is to remove carbon dioxide from the air. 48.

A paint painter er leans leans his his back back against against a painted painted wall wall while while looking into a 1 m long mirror at the opposite end of a rectangular room as shown in the given gure. How much of the painted wall can he see through the given mirror?

17th NSO - SET B

49.

8

1 m long mirror

A.

1m

B.

2m

C.

6m

D.

12 m

Painter

12 m

Painted wall

A scien science ce teach teacher er has has arrange arranged d the follo following wing sets of test tubes.

50.

(ii) 4 2 3 4

(iii) 3 1 2 1

(iv) 4 3 4 3

(v) 1 4 1 2

(vi) 3 1 3 4

The diagr diagram am below below shows shows two plants plants of the same species. Refer to the diagram to answer the following questions.

5 mL Hydrochloric acid + 10 mL Soap solution

10 mL Orange juice (2)

(1)

Few drops of Lemon juice

10 mL mL Nitric Nitric acid + 5 mL Window cleaner (3)

A. B. C. D.

(i) 2 4 1 2

10 mL mL Milk of of magnesia (4)

She asked the students to ll in the blanks by observing the above experimental set-up carefully. (a) (a) Turmeric solution turns red in test tubes (i) and (ii) . (b) China rose indicator turns dark dark pink in test tubes (iii) and (iv) . (c) Phenolphthalein Phenolphthalein gives pink colour in test tubes (v) and (vi) .

(i)

Which arrow indicates a process that would not lead to sexual reproduction?

(ii)

Which arrow represents a type of pollination that would result in greater adaptability of the part icular icu lar species spe cies to potenti pot enti al envi ronment ron ment al

A. C.


changes? (i)-Y , (ii)- Z Z (i)-Y , (ii)- X X

B. D.

(i)- Z , (ii)- X X (i)- X , (ii)-Y

Class 7

Set 1 Year 2015

LOGICAL REASONING

1.

Select a gure from the options which does not satises the same condition of placement of the dots as in Fig. (X).

7.

Five friends Aman, Karan, Gaurav, Raman and Pawan are sitting around a circle facing the centre. Pawan is second to the left of Raman, who is to the immediate left of Gaurav. Karan is the neighbour of Gaurav. Gaurav. Then who is sitting to the immediate right of Gaurav? A. Aman B. Pawan C. Raman D. Karan

8.

Tarun faces towards North. Turning to his right, he walks 25 metres. He then turns to his left an d walks 30 metres. Next, he moves 25 metres to his right. Finally, he turns to the right and moves 40 metres. In which direction is he now from his starting point? A. South-West South-West B. South C. North-West D. South-East

9.

Select a gure from the options, which when placed in the blank space of Fig. (X) would complete the pattern. patt ern.

Fig. (X) A.

B.

C.

2.

3.

D.

If in a certain code ‘VERBAL’ ‘VERBAL’ is written as ‘YHUEDO’, then how will ‘PERFE CT’ be written in the same code language? A. CTZXPUV B. RGTHGEV C. SHUIHFW D. SHTHGFW Which of the following numbers will complete the given number series? 7

4.

,

3

,

8

,

6

,

10 , 9

,

1 3 , 12 12 , 17 17 ,

A.

13

B.

14

C.

15

D.

16

? ,

22

D

?

The four different positions of a dice are given below. 1 3

1 4

4

5 2

Fig. (X)

6 2

1

2

D

4

A.

B.

D

Which number is on the face opposite to 1 ?

5.

6.

A.

6

B.

2

C.

3

D.

4

C.

Pointing to a photograph X said to his friend Y, “She is the only daughter of the father of my mother.” How X is related to the person in the photograph? A. Sister B. Son C. Nephew D. None of these Select a gure from the options which will continue the same series as established by the Problem Figures. Problem Figures

10.

The question consists of a set of three gures X, Y and Z showing a sequence of folding of a piece of paper. Fig. F ig. (Z) ( Z) shows s hows the manner m anner in which wh ich the t he folded fo lded paper has been cut. Select Sele ct a gure gur e from the options opti ons which would most closely resemble the unfol ded form of g. (Z).

?

2

A.

B.

C.

D.

D

D.

X

Y

Z

A.

B.

C.

D.

| 18th NSO | Class-7 | Set-1 | Level 1

SCIENCE

11.

12.

A plane mirror is positioned positioned at the corner of a road as shown in the given gure. Which man/men can the observer X observer X see see through the mirror? A. 2 only C. 1 and 2 only

C. X

D.

 1  2



16. 16.

Read the the given statemen statements ts and mark mark the correct correct option. Statement 1 : One complete to and fro motion of a clock’s pendulum takes one second. Statement 2 : Anything that occurs or appears at regular intervals can help us to measure time. A. Both statement 1 and statement 2 are true and statement 2 is the correct explanation of statement 1. B. Both statement 1 and statement 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true but statement 2 is false. D. Statement 1 is false but statement 2 is true.

17. 17.

A magnet magnet X is being moved slowly towards another magnet Y which which has attracted steel pins as shown in the given gure. The string of attracted pins A. Remains stationary B. Gets attracted to the left

3

B. D.

1 only 2 and 3 only

The given given diagram diagram shows an an electrical electrical appliance with a metal box, indicated by the dotted line, connected to a mains supply. Where should the fuse be placed? Switch Live

P ×

Metal box ×Q

Neutral

R

×

Earth

×

S A. C.

13.

14.

P R

Upside of the object will be down side of the the image. Right side of the object will be left side of the image.

B. D.

Q S

Which of the following statements are true? true? (i) High speed wind increases air pressure. (ii) At night, the land cools faster than water water which results in land breeze. (iii) At poles, the air is very cold cold and sinks close to the surface creating high pressure area. (iv) Air exerts pressure sometimes only. A. (i) and (ii) B. (ii) and (iii) C. (iii) and (iv) D. (i), (ii) and (iii) Three glasses containing water at the same temperature, are placed side by side touching each other as shown in the given gure. Given 50°C 50°C 50°C that glass 1 contains 0.3 kg of water, glass 2 contains 0.5 kg of water and glass 3 contains 0.1 kg of water. 1 2 3 Which of the following statements is true? Heat flows from glass 1 to glass 2 and from A. glass 2 to glass 3. B. Heat flows from glass 2 to glass 1 and from glass 2 to glass 3. C. Heat flows from glass 1 to glass 2 and from glass 3 to glass 2. D. Heat does not ow among these three glasses.

18.

C.

Gets repelled to the right

D.

Falls

Which of the following following is correct for lateral inversion? A. Right side of of the object will be be right side of the image. B. Left side of the object will be left side of the image.

18th NSO | Class-7 | Set-1 | Level 1 |

N

S

X

N

S

off from the magnet.

The diagram diagram shows a thin copper copper rod being being heated heated evenly along its length. Which of the following statements is true about the rod? Copper rod

Heat A. B. C. D.

The bar expands and becomes lighter. The bar will become shorter in length. The bar expands and its length increases. The bar expands and becomes heavier.

19. An objec objectt O is placed in between two plane mirrors, P and and Q, as shown in the given gure. P

R

15. 15.

Y

S

Q

O

T

U

Which is a possible image of the object? A. C.

R T

B. D.

S U 3

20.

Reeta puts two two different different objects in each each of the the following following containers. Container (i)

: Copper coin and iron nail

Container (ii) : Steel nail and aluminium earring Container (iii) : Marble and gold coin Container (iv) : Nickel coin and steel nail She can use a magnet to separate the objects in containers __________ . A. (i) and (ii) B. (i), (ii) and (iii) C. (i), (i) , (ii) (ii ) and (iv) (iv ) D. (i), (ii), (ii), (iii) (iii) and (iv) 21.

The given given gures gures show the colour changes in test tubes I, II and III, when China rose indicator is added to them. The respective solutions in I II III test tubes I, II and III (Magenta) (No colour (Green) change) are A. Soda water, Nitric acid, Orange juice B. Vinegar, Vinegar, Lime water, Sugar solution C. Sodium hydroxide, Lemon juice, Baking soda D. Tamarind Tamarind juice, Salt solution, Soap solution

22.

On the basis of physical and chemical chemical changes, nd the odd one out. P . Oxidation of a slice of brinjal Q. Burning of magnesium ribbon R. R. Crystallisation of copper sulphate S . Corrosion of a metal Q A. P B. R S C. D.

23.

The given owchart was was prepared prepared by Neelima for sorting materials into different groups. She handed over the chart to her teacher with few blanks. Fill in the blanks from the given options.

Metal ball, Pencil, Salt, Honey, Honey, Kerosene oil, Butter Edible Soluble in water

A.

B.

C.

D.

4

Non-edible

Insoluble in water

Solid

Liquid

P

Q

R

Floats on water

24. Which of the the following following changes changes does does not require require heat? A. We Wett clothes to dry clothes B. Rolling out roti from roti from a ball of dough C. Baking of a cake D. Expansion of metal rim 25.

Dilute hydrochlori hydrochloricc acid is added to dilute sodium hydroxide as shown in Dilute hydrochloric the gure. acid Which of the following is incorrect about the mixing Dilute sodium of these substances? hydroxide I. There is no change in the arrangement of atoms. II. On mixing the substances, substances, two new products products will be formed. III. The word equation equation for the reaction reaction is Hydrochloric acid + Sodium hydroxide Sodium chloride + Water IV. IV. The chemical reaction is called neutralisation and it is endothermic. A. II and III B. III and IV C. I and II D. I and IV

26.

Match the column I with column column II and and select select the correct option from the given codes. Column I Column II P. Ascorbic acid (i) Organic matter Q. Indigestion (ii) Calamine Calamine solution R. Ammonium hydroxide (iii) Amla S. Ant bite (iv) Milk of magnesia T. Basic nature of soil (v) Window cleaner P Q R S T A. (iii) (iv) (v) (i) (ii) B. (v) (ii) (iv) (iii) (i) C. (ii) (iii) (v) (i) (iv) D. (iii) (iv) (v) (ii) (i)

27.

A mixture contains contains three three differen differentt substances substances P P , Q and R. R. The properties of these substances are listed in the given table.

Sinks in water

Substances

Properties

P , Q and R and R

All of same size

U

P

Heavy, Heavy, insoluble in water

Q

Light, insoluble in water

R

Powder, soluble in water

Solid

Liquid

S

T

P -Butter, -Butter, Q -Honey, R -Honey, R-Salt, -Salt, S -Metal -Metal ball, T -Kerosene -Kerosene oil, U -Pencil -Pencil P -Salt, -Salt, Q -Honey, R -Honey, R-Butter, -Butter, S -Pencil, -Pencil, T -Kerosene -Kerosene oil, U -Metal -Metal ball P -Salt, -Salt, Q -Butter, R -Butter, R-Honey, -Honey, S -Metal -Metal ball, T -Pencil, -Pencil, U -Kerosene -Kerosene oil P -Pencil, -Pencil, Q -Honey, R -Honey, R-Butter, -Butter, S -Salt, -Salt, T -Kerosene -Kerosene oil, U -Pencil -Pencil

Which of the following sequence of methods will be suitable for separating each of the components from the mixture? A. B. C. D.

Filtration followed by evaporation Churning followed by magnetic separation Sedimentation-decantation and ltration followed by evaporation Evaporation followed by winnowing | 18th NSO | Class-7 | Set-1 | Level 1

28.

Observe the given diagram carefully. Y + + Water Z (Base)

32.

X

Open gas jar

X , Y and Z and Z are are respectively A. Ca, CaO, Ca(OH) 2 B. Mg, MgO, Mg(OH)2 C. Na, Na2O, NaOH D. C, CO2 , H2CO3 29.

Dazzling white light

Identify W , X , Y and Z and Z and and select the option that correctly lls the blanks in above paragraph.

White solid (Y ( Y ))

W

Refer to the given diagram of stomach of ruminant mammal with its parts labelled as P , Q, R R and S and select the correct option. A. The parts labelled P labelled P , Q, R and R and S are are called reticulum, rumen, abomasum and omasum, respectively. B. The part labelled Q is true stomach. C. Food is complete ly digest ed in chambers P and R and R. D. Digestion of cellulose takes place in P in P , S and R and R.

30.

33.

Three tubes A, A, B and B and C , as shown in the gure, were left in sunlight for one hour. Each tube was provided with a bicarbonate indicator which is used to indicate the presence of carbon dioxide in aqueous solutions. The indicator was red at the start of experiment.

Water + Bicarbonate indicator Water plant

Water + Bicarbonate indicator Tube A

Water plant

Water + Bicarbonate indicator

B. C. D.

Tube B

Tube C

Bicarbonate indicator will stay red in all the three tubes. Colour of bicarbonate indicator in test tube C will will change to yellow. Colour of bicarbonate indicator in test tube A tube A will will change to purple. Colour of bicarbonate indicator will change to purple in test tube B.

31. Sheep are the major source of wool. During the prod ucti on of wool from a shee p, it passes pas ses thro ugh several steps, such as scouring ( P ( P ), ), drying (Q ( Q), dyeing ( R), R), spinning (S ( S ), ), shearing (T ( T )) and carding (U ( U ). ). Which of the following options shows the correct sequence of these steps? A. B. C. D.

B.

Undernutrition Scurvy

C.

Overnutrition

D.

Undernutrition Obesity

T → P → Q → U → R → S P → T → Q → R → U → S U → P → R → Q → T → S R → P → Q → T → S → U


Y

Obesity

Z

Kwashiorkor Marasmus Marasmus

Kwashiorkor

Blood pressure Anaemia

Rickets

Marasmus

Goitr Goitree

Match the items given in column I with the items in columns II and III and select the correct option. Column I Column II Column III 1. Well-padded P. Polar bear a. Desert wide feet b. Polar broad 2. Flat and broad Q. Monkey region paws c. Tropical 3. Feet with sticky R. Camel forests pads and long 4. Thin and S. Penguin tail 5. Streamlined T. Red-eyed frog body and webbed feet

C. D.

P b, 3

Q c, 4

R a, 4

S c, 5

T a, 2

b, 2 b, 1 b, 2

c, 4 a, 4 a, 4

a, 1 c, 2 a, 3

b, 5 a, 5 b, 5

c, 3 c, 5 a, 5

34.

Which of the following food items are sources of sucrose, starch and cellulose respectively? A. Meat, fruits and potatoes B. Spinach, corn and meat C. Table sugar, rice and grass D. Fruits, eggs and wheat

35.

Various technical terms related to respiratory system of different organisms are hidden in the given word grid. Which of the following is not present in the given word grid?

Which of the following changes in the colour of indicator will be observed in the experiment? A.

Overnutrition

B.

Snail

X

A.

A.

Snail

Read the given paragraph. W is a form of malnutrition in which nutrients are over supplied relative to amounts required for normal growth, development and metabolism. It leads to X . Deciency is another form of malnutrition. Deciency of nutrients like protein leads to Y whereas deciency of proteins and calories leads to Z .

R M I G B

S I

L L

U L

N N

A O I D O R M Y M S A H A A N T G P T B Z R E A A T S I P I R A C L C

G T R A C

H E A

(i) (ii) (iii) (iv) (v)

The air tubes of insects. Skeletal structure which protects the lungs. The opening through which humans inhale air. Small opening on the sides of the body of an insect. A ap like structure which covers the glottis at the time of swallowing in humans. (vi) Respiratory organ of sh. A. (i) and (ii) (ii ) only onl y B. (ii), (v) and (vi) only C. (iii) and (iv) only D. (iv) and (v) only 5

36.

The diagrammatic diagrammatic representation representation shows the pulmonary and systemic circulations. Identify the parts labelled as a, b, c, and d and and select the correct option. Deoxygenated blood

Lungs Heart

c

RA

LA

RV

LV

C. D.

37.

Body

a- Pulmonary artery, artery, c- Aorta, a- Pulmonary vein, c- Pulmonary artery, a- Pulmonary vein, c- Vein, a- Aorta, c- Pulmonary vein,

a

S

Oxygenated blood

b- Pulmonary vein, d - Vein b- Vein, d - Aorta b- Aorta, d - Pulmonary artery b- Vein, d - Pulmonary artery

Priya conducted an experiment experiment as shown shown here. here.

A

B

C

Select the correct statement regarding this. A. Lime water in test tube B does B does not turn milky because potassium hydroxide solution absorbs the CO2 from incoming air. B. Lime water in test tube C turns turns milky as germinating seeds release CO 2 which enters test tube C . C. Lime water in test tube B B turns milky because germinating seeds release CO 2 into it. D. Both A and B 38.

P Q R

d

Deoxygenated blood

B.

Seed Seed/F /Fru ruit it

Oxygenated blood

b

A.

39. The given table shows shows the character characteristics istics of four four different seeds or fruits P fruits P , Q, R and R and S .

A. B. C. D.

41.

A. C. D.

6

Heavy

By wind By animals By animals By explosion

By animals By animals By wind By water

By water By explosion By animals By animals

By animals By water By water By wind

Study the given given concept concept map map and identify identify X , Y and Z and Z .

B.

Which of the following statements is incorrect regarding its adaptations? (i) Q is slit-like and has ap to prevent the entry of sand. (ii) R is R is leathery for chewing thorny plants. (iii) T is is used for storing water. (iv) S is is sticky and webbed to prevent it from sinking into sand. A. (i) and (iii) only B. (ii) and (iv) only C. (iii) and (iv) only D. (ii) and (iii) only

Big

It has hooks. It has wings. It has eshy and sweet pulp. It is buoyant with a brous husk.

Plant

R

S

Small Light Small Light Big Heavy

40. Read the given statements statements and select the correct option. Statement 1 : The level of groundwater below the surface of the earth at a given place is known as the water table. Statement 2 : Extensive use of groundwater groundwater in cities for domestic and industrial purposes is resulting in lowering of water table. A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true but statement 2 is false. D. Both statements 1 and 2 are false.

T

U

Weight Other her charac aracte terristics

By which method P , Q , R R and S get most likely dispersed? P Q R S

The given given picture picture shows a camel camel with its its different different parts part s labelle la belle d as P, Q, R, S, T and and U . P Q

Size Size

42.

Propagates vegetatively by roots

Propagates vegetatively by leaves

Propagates vegetatively by stem

X

Y

Z

X Bryophyllum Dahlia Bigonia Bigonia Bryophyllum Bryophyllum

Y Bougainvillea Bougainvillea Bigonia Bigonia Ginger Strawberry

Refer to the given diagram of human skeletal system with various joints labelled as P as P , Q, R, R, S , T and and U . Select the correct option regarding this. A. Joints R Joints R,, T and and U move move in one plane only. B. Joints P, Joints P, R and T move move in more than one plane. C. Joint P is an immovable joint. Joints R, Joints R, S and T move move in D. more than one plane.

Z Carrot Potato Asparagus Dahlia

P Q R U

S

T


43.

Refer to the given food web. Q

C.

W

P

D.

V R

U S

45.

T

Which of the following statements is incorrect regarding it? A. B.

In the given food web, P web, P and and W are are producers. The food web consists of more than five food chains. In the given food web, R web, R behaves behaves both as primary consumer as well as secondary consumer. In the given food web, T could be a deer or rabbit.

C. D.

44.

The given diagram shows soil pr of il e wher wh er e di ffer ff er ent en t so il layers are labelled as P , Q, R and S . Select the incorrect option regarding this.

P

B.

Match column column I with column column II and select select the correct option from the given codes. Column I Column II P . Weaving a. Process Process of making making yarn yarn from from bres Q. Knitting b. Spun from bres and then used to make fabric R. R. Ginning c. A single yarn is used to make fabric S . Spinning d. Process of arranging two sets of yarns together to make a fabric Yarn T . e. Combing of cotton fibres to remove seeds

Q A.

R

B. S

P is is rich in humus. Few plant roots can reach Q.

A.

R is R is saturated with moisture and represents water table. S is is a porous layer and consists of rock pieces with diameter less than 2 mm.

C. D.

P c d d c

Q d c c d

R e a e e

S a e a b

T b b b a

ACHIEVERS SECTION

46.

In a 100 m race, Gaurav and Sachin Sachin reached reached the nishing nishing

Fill in the blanks with an appropriate option.

line at the same time. Which of the following are

Both (i) and (ii) are essential for rusting. In test tube (iii) , the iron nail will rust faster. The process of depositing a layer of a metal like chromi um or zinc on iron to prevent rusting is called (iv) .

possible possibl e graphs to show that b oth competitors competi tors reached rea ched the nishing line at time t ? S pe pe ed ed (m (m s –1)

S pe pe ed ed (m (m s –1)

Distance(m)

v r a a u G

Sachin

i n h c Time(s) S a

Time(s) t

Time(s) t

(ii)

(iii)

A.

(i) and (ii) only

B.

(i) and (iii) only

C.

(ii) and (iii) only

D.

(i), (ii) and (iii)

Anamika has arranged arranged the following experimental set-up to study the conditions necessary for rusting to take place.

Iron nail

1

Oil

Iron nail

Water Water

Damp (slightly wet) cotton wool

Chemical to remove moisture in air 2


A. B. C. D.

S a c h i n

t

(i)

47.

v r a a u G

v r a a u G

Painted nail 3

Iron nail 4

48.

(i) carbon dioxide oxygen water water

(ii) (iii) moist air 2 water 1 oxygen 3 nitrogen 4

(iv) oxidation galvanisation galvanisation corrosion

Raj is fond fond of gardening gardening.. He planted planted two two different different types of owering plants, pea and papaya in his garden. Both the plants grew healthily in the garden and then owered after sometime. To check check the fruit setting of these plants Raj covered the owers of both plants using a polythene bag. After some days, he removed the polythene bags and found small pea fruits, but no fruits in papaya. What could possibly be the reason for this? A. Papaya plant did not get essential nutrients for setting fruits and seeds. B. Papaya plant has unisexual owers and female owers can produce fruits in presence of pollinators only. C. The ower of pea plant gets converted to fruit without pollination and fertilisation. D. Papaya plant is pollinated by insects whereas pea plant is pollinated by the agency of water. water. 7

49.

Radha bought three dierent types of soil samples, P , Q and R from the market and then set-up an experiment as shown to test the suitability of these s oils for making statue. She put 50 gms of dry powdered soil of each sample separately in three dierent funnels placed over three different beakers and then slowly poured water on the soil samples till the water just started dripping from the funnel. She then weighed the three soil samples separately. separately. The results are shown in the given table. Type of soil

Original weight of soil

Weight of soil sample after pouring water

P

50 gm

60 gm

Q

50 gm

100 gm

R

50 gm

70 gm

Which soil sample can she use for making statue?

50.

A.

P

C.

and Both P and

Q

B.

Q

D.

Both

Q and R

The given given graph graph shows shows changes changes in the pressure pressure in in lungs lungs during breathing. Air pressure in the lungs 760 P (mm Hg)

Atmospheric pressure = 760 mm Hg Q

R

S

T

Time

758

Which of the following is incorrect regarding this? (i) Region R to T represents represents inhalation. (ii) Region P to to R represents inhalation. (iii) Region P to to R represents exhalation. (iv) Ribcage will move upward and diaphragm will get attened at point S . (v) Ribcage will move downward and diaphragm will become dome shaped at point S . A. (ii), (iii) and (v) B. (i), (iii) and (iv) C. (ii) and (v) only D. (i) and (iii) only


8


Class 7

Set 2 Year 2015

LOGICAL REASONING

1.

Three Three of the the foll followi owing ng four four optio options ns are are alik alikee in a certain way based on their positions in the given arrangement and so form a group. Find the one that does not belong to that group.

6.

B 4 @ D A © 7 9 F % 2 R 5 H 6 E * N $ 1 U W 3 P T 8 d V # Y I A. C. 2.

562 ©9D

B. D.

WPU d # T

There There is is a certai certain n relat relation ionshi ship p on the either either side side of ::. Identify the relationship and nd the missing term. REASON : SFBTPO :: MAGNET : A. C.

3.

NBHMFU NBHOFU

B. D.

7.

?

8.

5.

B. C. D.

Monday Sunday Friday

Find Find the missi missing ng numbe number, r, if a cert certai ain n rule rule is foll follow owed ed in all the three gures. 1

3

3 30 5

2 72 4

4

6

66 61

1 5

?

2

8

B. D.

40 90

Two pos positi itions ons of a dice dice are are shown shown below below..

B.

C.

When six is at the bottom, which number will be at the top?

D.

Some Some boys boys are are sitt sitting ing in thre threee rows rows all all fac facing ing North North such that S is in the middle row. P is just to the right of S. Q is just behind of P while R is in the North Nort h of S. In which whic h directio dire ction n of R is Q? A. C.

Saturday

A. C.

same condition of placement of dots as in Fig. (X)?

4.

A.

NBIPFS O C I PG U

Which Which of the the follow following ing gures gures do not not sat satis ises es the

A.

Anu remem remember berss that that her her frie friend nd had had vis visite ited d her her after after th th 13 but before 18 of the month, while Anu's sister remembers that Anu's friend had visited after 16 th but before befo re 20 th . If it was Friday on 1 st of the month, then on which day of the week, Anu's friend visit to her?

South North-East

B. D.

South-West South-East

Which Which of the the foll followi owing ng option optionss will will comple complete te the the pattern patt ern in Fig. (X)?

A. C. 9.

1 4

B. D.

2 5

Selec Selectt the the term term from from the option optionss which which will will conti continue nue the given series. ? 2B11, 4E13, 8H15, A. B. C. D.

15K17 16K19 16J17 16K17

10. Select Select the the correc correctt mirror mirror image image of the the Fig. Fig. (X), (X), if the mirror is placed vertically to the right.

?

9 Fig. (X)

Fig. (X)

A.

C.

2

B.

D.

A.

C.

B.

9 9

D.

9

9


SCIENCE

11.

Which Which of the the followin following g stateme statements nts is/are is/are true true regard regarding ing the effects of using a thin converging lens instead of a thick converging lens? (i) (ii) (iii) A. C.

1 3

B. D.

2

1

3

17.

4

2 4

14.

–1

0.48 m s

18.

0.58 m s

C.

2.17 m s –1

D.

3.17 m s –1

9

12

X

Mirror

What is the value of angle X ? 20° 40°

B. D.

D.

The molecules expand as ice changes to steam. The molecules move faster as ice changes to steam. The molecules move closer to each other as ice changes to steam. The intermolecular force of attraction increases as ice changes to steam.


speed speed speed speed

of of of of

10 20 30 40

m m m m

s –1 in s –1 in s –1 in s –1 in

2 s. 5 s. 10 s. 20 s.

Both statement 1 and statement 2 are true and statement 2 is the correct explanation of statement 1. Both statement 1 and statement 2 are true but statement 2 is not the correct explanation of statement 1. Statement 1 is true but statement 2 is false. Statement 1 is false but statement 2 is true.

19. Which Which coil will will make make the the stronges strongestt electrom electromagne agnett for a given ow of current? A 10 cm coil with 100 turns. A 5 cm coil with 200 turns. A 10 cm coil with 200 turns. A 20 cm coil with 200 turns.

20. Match Match the the column column I with with colum column n II and sele select ct the correct option from the given codes.

30° 50°

15. A piece piece of ice is being being heated heated till till it turns turns to water water and then to steam. Which of the following statements is true?

C.

C. D.

A. B. C. D.

40°

A. B.

A.

Time (s)

Two plane plane mirrors mirrors are are placed placed at at 90° to each each other other.. A ray of light strikes one mirror and follows the path as shown in the gure. Mirror Light ray

a a a a

Statement 2 : Convex lens is used as magnifying glass.

B. 5

reaching reaching reaching reaching

Statement 1 : Convex lens can form real and inverted images.

9

3 2 0

A car A car A car A car

Read Read the give given n stateme statements nts and and mark mark the corre correct ct option option..

–1

B.

A. C.

Which Which car, car, moving moving from from rest, rest, has an an average average accele accelerati ration on –2 of 2.0 m s ? A. B. C. D.

Time

13. The dista distance nce-tim -timee graph graph of motion motion of of a cycle cycle is show shown n here. What is the average speed of cycle over a time period peri od of 12 s? Distance (m) A.

(i) Cyclones are accompanied accompanied by very strong winds. (ii) The centre centre of cyclone cyclone is a high high pressure pressure area. (iii) Cyclones are known as typhoons in American continent. (iv) There is heavy rain fall in the centre of cyclone. A. (i) only B. (ii) only C. (i), (ii) and (iii) only D. (ii), (iii) and (iv) only

The image formed will be brighter. The focal length will be longer. The image formed will always be virtual. (ii) only B. (i) and (ii) only (ii) and (iii) only D. (i) and (iii) only

12. A solid solid subs substan tance ce is placed placed e r in a boiling tube and heated u t steadily. The temperature- a r e time graph of the substance p m is shown in gure. At which e T labelled point would the substance be a mixture of liquid and gas? A. C.

16. Which of the the followi following ng statem statements ents about about cyclone cyclone is/are incorrect?

Column I

Column II

(a)

Bulb

(i)

(b)

Cell

(ii)

(c)

Battery

(iii)

(d)

Open switch

(iv)

A. B. C. D.

(a)-(i), (b)-(ii), (c)-(iv), (d)-(iii) (a)-(i), (b)-(iv), (c)-(ii), (d)-(iii) (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii) (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv) 3

21.

Kanika identied the nature of few substances with the help of three different indicators. She listed down her observations in the given table with some blanks. S. No.

Substance

Red litmus paper

Turmeric solution

p

Lime water blue

2.

Curd

no change

no change

3.

Table salt

no change

no change no change

4.

Toothpaste

5.

Lemon juice no ch change

Substances Edible

green q

re red

no ch change magenta

A. B. C. D.

22.

q

Magenta Red Blue Green

r

Green Magenta Magenta Red

Magenta Green Green Blue

Burner

Spirit lamp

Crushed naphthalene balls and sand

Ice

C. D.

Sinks

Floats

P

Q

R

S

Naphthalene crystals

In set-up 1, chemical-reversible change is taking place while in set-up 2, physical-irre physical-irreversi versible ble change is taking place. In set-up 1, chemical-irreversible change is taking place while in set-up 2, physical-reversible physical-reversible change is taking place. In both set-ups, physical-reversible changes are taking place. In both set-ups, chemical-irreversible changes are taking place.

-Oil, Q-Common salt, R-Matchstick, S -Coin -Coin P -Oil, -Common salt, Q-Glycerine, R-Coin, S -Matchstick -Matchstick P -Common -Glycerine, Q-Common salt, R-Coin, S -Matchstick -Matchstick P -Glycerine, -Matchstick P- Glycerine, Q -Sand, R-Coin, S -Matchstick

Sahil took some iron lings and mixed them well with sulphur powder. He could separate the iron lings with the help of a magnet. Then, he heated the mixture for some time and tried to separate the iron lings with the magnet but he could not because

D.

On heating, a chemical change takes place and a new compound is formed On heating, a physical change takes place hence, iron and sulphur get mixed up On heating, iron evaporates and only sulphur is left behind None of these.

Match the column I with with column II and select the correct option from the given codes. Column I

(i)

Identify the types of changes taking place in these set-ups.

B.

Soluble in water

C.

25.

Set-up 2

A.

Miscible with water

B.

Molten sugar turns into brown caramel and then to black charcoal.

Ice on watch glass

Non-lustrou rous

A.

Water droplets

Set-up 1

4

24.

Fumes of caramel and water vapours

Test tube

Lus Lustrous

A. B. C. D.

Mrs. Rama, a science science teacher has arranged the following set-ups to demonstrate different types of changes.

Test tube holder

Opaque

Identify the substances.

s

Blue Blue Red Magenta

Non-edible

Transparent

s

Identify p, q, r and and s. p

Four different different substances substances are categorised categorised based based on their properties in the given owchart.

China rose indicator

1.

r

23.

Column II

Fast change

(p) Occurrence Occurrenc e of day and night (ii) Periodic change (q) Spoiling of food (iii) Reversible change (r) Blowing of a balloon (iv) Undesirable change (s) Dropping an object (i) (ii) (iii) (iv) A. p s q r B. r q p s C. s p r q D. q r s p

26. Which of the following methods can be used to separate each component of the mixture containing iron lings, chalk powder and sugar? A. B. C.

D.

Evaporation, use of a magnet and separating funnel Use of a magnet, ltration, followed by evaporation Winnowing, ltration, followed by condensation Handpicking, threshing, followed by evaporation | 18th NSO | Class-7 | Set-2 | Level 1

27. 27.

Read Read the given given stat statemen ements ts and and select select the the correct correct option.

31. 31.

Statement 1 : Calamine solution is applied on the skin when an ant bites. Statement 2 : Ant injects ammonia into the skin which can be neutralised by rubbing with calamine solution.

A.

C. D. 28.

andle


B.

I

Base

., HNO3, HCl e.g .,

., Ca(OH)2 e.g .,

Water Beaker

Which of the following options correctly depicts the results of the experiment after few minutes?

Observe Observe the the given given owc owchart hart carefully carefully and mark mark the the option which best represents I, II, III and IV.

Compounds

Study Study the given given experi experiment mental al set-up set-up,, in which which a burning burn ing candle can dle has been b een plac ed in a beake r lled with w ith water. The candle has been covered by an inverted glass jar. Glass jar

A.

B.

C.

D.

32. Refer Refer to the the given given diagra diagram m which which shows shows various various parts parts of human digestive system labelled as I, II, III, IV and V. I

II ., NaCl, IV e.g .,

II

V IV

Ino Inorganic

Organic

., H2SO4 e.g ., I

., III e.g ., II

A. B. C.

Salt Alkali Acidic Salt Acid

D.

Acid Soda ash Salt Salt

III

III

Acetic acid Iron sulphate Hydrochloric acid Formic acid

IV

Identify the organs and select the incorrect statement regarding them.

Limestone Iron oxide Copper sulphate Baking soda

A. B. C. D.

29. Refer Refer to the the given given table table showi showing ng the the charact characteris eristics tics of three types of fabrics (I, II and III). Fabrics

Sour Sourcce of of individual

Air spaces between fbres

Absorption of water

33.

fbres

I

Plant

Less

Medium

II

Animal

More

Hi g h

III

Chemical

Minimum

Minimum

A.

B.

A. B.

C.

C. D.

30. If the perco percolati lation on rate rate of water water throug through h a soil soil sample sample is 50 mL/min, then how much time will 500 mL of water take to percolate completely into the soil? A. C.

5 minutes 15 minutes

B. D.


10 minutes 20 minutes

D. 34.

Lungs

W h ic i c h of o f t he h e f ol o l l ow o w i ng ng statements is correct regarding the given schematic of blood circulation in human body?

Which of the following statements is incorrect regarding this? Fabric I is more suitable for summer clothing. Fabric II will allow more body heat to escape than fabric I. Fabric III can neither absorb body sweat nor can keep the body cool. Fabric II is more suitable for winter clothing.

Organ V is involved in storage of bile not its produc productio tion. n. Organ II secretes digestive juice which contains mucus, hydrochloric acid and digestive enzymes. Organ IV is the largest gland of the body. body. Organ I is involved in the absorption of water from food.

P

Q Heart

R

S Structures P and S have thick, elastic walls to allow stretching. Capillaries P and and R carry oxygenated blood. Q carries deoxygenated blood at high pressure whereas S carries carries oxygenated blood at low pressure. R and S have have a series of valves and are supercially placed.

Read the given given state statemen ments ts and select select the correct correct optio option. n. Statement 1 : Chemical digestion of food involves breaking brea king down of food by chewing chewi ng and churning chur ning.. Statement 2 : Mechanical digestion of food involves conversion of complex substances such as carbohydrates into their simpler forms such as glucose by enzymatic action.

5

A. B. C. D.

Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. Statement 1 is true but statement 2 is false. Both statements 1 and 2 are false.

38. 38.

B. C. D.

The socks were made of nylon while saree was made of silk. The saree had been washed in starch solution to make it stiff. The socks were black in colour while the saree was white in colour. After washing, socks had been dipped in iodine solution before drying.

A. B. C. D.

A. B. C. D. 37. 37.

Refe Referr to the the give given n key key. (a) (a) Fibres obtaine d from natura l resourc es - Go to II (a) (b) Fibres obtained from chemicals - Go to IV (b) II. (a) Cellul Cellulose ose is the struct structura urall materi material al - Go to III (b) Fibres made up of complex proteins - Go to IV (a) III. III. (a) (a) Fibr Fibree obta obtain ined ed from from seed seedss - P (b) Fibre obtained from stems - Q IV. IV. (a) Poor conducto conductorr of heat heat and gives gives smell smell of burning hair when burnt - R (b) Melts on burning - S Identify P , Q, R and S and select the correct option regarding them. A. P is is the strongest natural bre available. B. Q is one of the cheapest bre and is also known as golden bre. C. R can be obtained only by killing of source organism. D. S provides the best clothing material for winter clothing.

L

Partially parasitic

Nepenthes

Present

M

N

Completely parasitic

Present Absent Present Present

M

Partially heterotrophic Partially heterotrophic Autotrophic Partially parasitic

N

Absent Absent Present Absent

Joints are of different types based on the degree of freedom of movement. The joints found between the skull bones are P joints. Joint Q is found between the skull and lower jaw. The joint between skull and rst vertebra of backbone is R joint. Select the correct option regarding these joints P , Q and R. A. B. C. D.

Sparrow

The snake is both a predator and a prey. prey. There is one producer and one omnivoro us organism in this food web. A decrease in population populatio n of frog will cause an increase in insect population. There are three food chains in this food web.

Mistletoe

39. Read Read the given given parag paragrap raph. h.

Eagle Plant

Mode of nutrition

L

Snake

Insect

Presence/Absence of leaves

Select the correct option for L, M and and N .

36. Which of the the followi following ng statem statements ents is incorr incorrect ect for the given food web? Frog

Name of the plant

Cuscuta

35. While While using using iodine iodine in in the labor laborator atory y, some some drops drops of iodine fell on Rashmi’s socks and some fell on her teacher’s saree. The drops of iodine on the saree turned blue-black while the colour of iodine drop did not change on the socks. What can be the possible reason? A.

Refe Referr to the the giv given en tab table le..

40. 40.

Joint P shows shows 180° of movement in two planes. Joint Q shows 180° of movement in one plane. Joint R shows 360° of movement in two planes. Joint P shows shows 360° of movement in one plane.

Anushka Anushka bagged bagged four four differ different ent kinds of flowers flowers on the potted plants as shown below and left them undisturbed. Which Which of these four owers is the most likely to produce fruits and seeds?

A.

B.

C.

D.

I.

6

41. Match Match column column I with with column column II II and selec selectt the corre correct ct option from given codes. P . Q. R. R. S .

Column I Anther Pedicel Stigma Petals

A. B. C. D.

– P – – P – – P – P – –

Column II (i) Usually brightly coloured (ii) Contains pollen grains (iii) Stalk of the ower (iv) Receives pollen grains

(iv), Q – (iii), R – (ii), S – – (i) (ii), Q – (iii), R – (iv), S – – (i) (ii), Q – (i), R – (iii), S – – (iv) (iii), Q – (iv), R – (i), S – – (ii) | 18th NSO | Class-7 | Set-2 | Level 1

42. Refer Refer to the given given ow chart chart..

Protective food

No

Help to build and repair tissues

Yes

P

Yes Inorganic salts essential for chemical No reactions in cells

Q

Yes

44. Study Study the the follow following ing featur features es :

R

Identify P , Q and R and select the correct option regarding it. A. B.

C.

D.

(iv) The material used to make the shaped-pieces. (v) The strength with which she pulled each shaped piece through the water. A. (i), (ii) and (iii) B. (i), (iii) and (iv) C. (i), (iii), (iv) and (v) D. (i), (ii), (iii), (iv) and (v)

Defici ency of P can lead to diseases like kwashiorkor and marasmus. If Q is water soluble then it is not stored in body but if it is fat soluble, it can be stored in body for future use. Deciency of R of R can lead to diseases like anaemia, goitre, rickets, etc. All of these.

43. Chitra Chitra wanted wanted to see see what what body body shape shape would would enabl enablee an animal to travel most easily through the water. She cut out shapes using pieces of styrofoam and tied a piece of string to each of them. Then she pulled them through the sh pond in school. What factors should she keep the same so that the experiment is a fair one? (i) The length of the string. (ii) The size of the shaped-pieces. (iii) The material used to make the string.

• • • • •

Flowers ar are sm small an and du dull. Po ll ll en en gr gr ai ain s ar e l ig ig ht ht we wei gh gh t. t. St am ame ns ns an an d s ti tig ma mas ar are ex exp os os ed ed . Flow Flower erss are are colo colour urle less ss and and odo odour urle less ss.. Poll Pollen en grai grains ns are are pro produ duce ced d in in lar large ge numb number ers. s.

Above cited features are the characteristics of owers in which pollination is brought about by the agency of

A. C.

Wind Insects

B. D.

Birds Explosion.

45. Whic Which h of of the the follo followi wing ng b e s t d e s c r i b e s w h a t happens to the parts X and and Y during inhalation and exhalation?

Y

X

Inhalation X

Exhalation Y

X

Y

A.

Contracts Moves down Relaxes

Moves up

B.

Relaxes

C.

Contracts Moves up

Relaxes

D.

Relaxes

Contracts Moves down

Moves down Contracts Moves up Moves up

Moves down

ACHIEVERS SECTION

46. The diagr diagram am shows shows an an electri electricc bell. bell. Which Which material materialss would be suitable for the parts labelled X , Y and Z ?

47. Observe Observe the the given given figure figure carefully carefully and fill fill in the blanks blan ks by choosing choo sing an appro priate pria te option. opti on.

X

X

Z (turns lime water milky)

Y

Y

Z

1 X

X

A. B. C. D.

Soft iron Soft iron Soft iron Steel spring

Y

Brass Soft iron Brass Soft iron


Z

Soft iron Steel spring Brass Steel spring

2 Y

3 Z

A.

Sugar

Nitric acid

Nitrogen

B.

Salt

Ammonium hydroxide

Ammonia

C.

Baking soda

Acetic acid

Carbon dioxide

D.

Copper

Hydrochloric acid

Hydrogen

7

48. 48.

Read Read the the giv given en pas passa sage ge..

Select the correct statement regarding this.

Sometimes during heavy physical exercise, your bo dy ca nn ot ge t en ou gh to produce the P required energy. To get the additional energy, Q respiration occurs in your R , during which part ial breakdow brea kdow n of gluc ose occurs occu rs and S is produced. prod uced.

A.

For rst three hours, the plant was kept in a dark room.

B. C.

At 3rd hour, the plant was moved to a sunny place. For rst 3 hours, the plant was photosynthesising but was not respiring. Both A and B

Which of the following statements is incorrect regarding P , Q, R and S ? A. B. C. D. 49. 49.

represents oxygen. P represents Q is the type of respiration that occurs in the presence of oxygen. R represents muscle cells of our body. Accumulation of S in muscles causes muscular cramps.

The given given graph graph shows shows the variat variations ions in oxygen oxygen release and uptake by a plant over a period of 10 hours.

50. 50.

Read Read the the giv given en pas passa sage ge.. The land near the equator is colder than than the land away from it. Near the equator, Sun's rays fal l vertically. As the latitude increases, the rays become more and mo re slanting. Vertical rays spread over a larger land land area than slanting rays. Also, they pass through a thicker layer of the atmosphere which absorbs a large part of their heat. Hence, the land near the equator gets heated up lesser by by the sun than the land away from it, in a given time. Some of the words have been italicised in the given passage. Select the incorrect statement regarding these.

Increasing oxygen release

A.

0 Increasing oxygen uptake

D.

1

2

3

4

5

6

7

8 9 10 Time / hour

B. C. D.

The words colder and and lesser need need not to be replaced as they are correctly mentioned. should be replaced by smaller. Larger should should be replaced by thinner. Thicker should None of these


8


Class 7

Set A Year 2016

LOGICAL REASONING

1.

Which of the following following gures do not satisfy satisfy the same condition of placement of dots as in Fig. (X)?

A.

Which Which of the following following is the the net net of the given given Fig. (X)?

A.

2

C.

D.

If the rst and the second digits of each of the following numbers are interchanged, then which number will be the small est ? 358 426 853 674 592 A. 358 B . 426 C. 853 D . 674

8.

Two Two positions positions of a dice dice are shown below. below. If the face with 1 dot is at the bottom, then the number of dots on the top face is

D.

A.

2

Find the missing number, number, if same rule is followed in all the three gures.

B.

3

C.

4

A. B.

16 18

D.

5

C.

10

D.

14

9.

Read the following following informat information ion carefull carefully y. 'A@B' means 'A is added to B'. 'A * B' means 'A is multiplied by B'. 'A#B' means 'A is divided by B'. 'A$B' means 'B is subtracted from A'. Total age of 12 boys is 'X' and the total age of 13 girls is 'Y'. What is the average age (A) of all the boys and girls girl s together toge ther ? A. C.

5.

B.

7.

B.

C.

4.

A. D.

Fig. (X)

3.

There is a certain relationship relationship between gures (1) and (2). Establish the same relationship between gures (3) and (4) by selecting a suitable gure from the options that would replace the (?) in Fig. (4).

B.

C.

2.

6.

A = (X@Y (X@Y)) # 25 A = (X@Y) * 25

B. D.

A = (X$Y (X$Y)) # 25 None of these

There are 8 friends friends A, B, B, C, D, E, F, G and H seated seated in a circle facing the centre. AC, DG, HE and FB are seated adjacent to each other. A is also seated adjacent to H. B is second to the right of H. E is third to the right of C. What is C's position with reference to F? A. 5th to the right B. 4th to the left th C. 4 to the right D. 3rd to the right

In a certain certain code language language,, the the word word FIENDISH FIENDISH is written as DFHNSEI I. How will the word HES ITATE ITATE be writ ten in that langu age ? A. C.

10.

HSTTEEAI HSTTAEEI

B. D.

H T T SA E E I H ST T I E E A

Select a gure from the options, which when placed placed in the blank space of Fig. (X) would complete the patte rn. A.

B.

C.

D.

| 19th NSO | Class-7 | Set-A | Level 1

SCIENCE

11. Sagar wants to magnetise an iron bar E F by the stroking stro king method. method. The The given gure shows the direction of stroke.

Magnet

Which of the following is a possible set of polarities polarities for the given arrangement? P Q E A. North South South B. North South North C. South North South D. South North North 12.

(a) (b) (c) (d) (e) A. B. C. D.

P

Direction of stroke

E

Q F

Iron bar

F South North North South

16.

A photographer wishes to take pictures without being noticed. He sets up two plane mirrors together with his camera. Which arrangement of mirrors will allow the photographer to take pictures of someone behind the camera? A.

Two parallel rays of light strike a concave concave lens. lens. Which Which of the following correctly shows the passage of the rays after passing through the lens? A.

B.

C.

D.

B.

C.

17. 17.

Live wire Misha , a class VII Switch student suggests the given circuit setup. Supply Bulb Her teacher said that Neutral this circuit is unsafe wire Fuse becau se A. The switch is wrongly connected B. The fuse is wrongly connected C. The bulb is fused D. Live wire and neutral neutral wire have been interc int erchang hanged. ed.

18.

Three liquids with their respective boiling and freezing points poin ts ar e shown sho wn in i n the th e giv en table. ta ble.

D.

13. The diagram shows a man standing under a shelter on a sunny day. Given that the man feels hot, which of the following shows the processes of how thermal energy from the Sun reaches the man? A. B. C. D.

Column-I Column-II Railway engine (i) Quintal Packet of chilli powder (ii) kg Sack of wheat (iii) mg Huge bag of sand (iv) g Aspirin tablet (v) Metric ton (a) - (v), (b) - (iv), (c) - (i), (d) - (ii), (e) - (iii) (a) - (i), (b) - (ii), (c) - (iii), (d) - (iv), (e) - (v) (a) - (ii), (b) - (iv), (c) - (v), (d) - (iii), (e) - (i) (a) - (iii), (b) - (ii), (c) - (iv), (d) - (v), (e) - (i)

Sun

Thick plastic roof

Liquids Mercury

Radiation → Conduction → Radiation Radiation → Conduction → Convection Radiation → Convection → Radiation Radiation → Convection → Convection

Alcohol

Pentane

15. Match Column-I with Column-II and select the correct option. 19th NSO | Class-7 | Set-A | Level 1 |

Boiling point 357°C 78°C 36°C

A thermometer that can measure both –50°C and 38°C should be lled with __________. A. Mercury only B. Alcohol only C. Pentane only Either alcohol or pentane D.

14. Read the given statements and select the correct option. Statement 1 : It is difcult to ride a bicycle against the direction of wind. Statement 2 : High speed winds are accompanied by increased air pressure. A. Both statements 1 and 2 are true and sta tem ent en t 2 is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. C. Statement 1 is true but statement 2 is false. D. Both statements 1 and 2 are false.

Freezing point –39°C –112°C –180°C

19.

Solve the following riddle by identifying X , Y , Z . X : I am present in a closed circuit only. Y : I am a source of energy available in different shapes and sizes. Z : I am a device used for making and breaking the electric circuit. X Y Z A. Electric current Electric switch Electric cell B. Electric switch Electric cell Electric current C. Electric current Electric cell Electric switch D. Electric cell Electric current Electric switch 3

20.

21.

22.

Two Two identical identical balls balls are released at the same time time from a building of height 85 m, one from the top while the other from half way up. Which of the following quantities is same for both balls? A. Time of travel B. Final speed C. Acceleration Acceler ation D. Total displacement displacement

C. D. 25.

P. Q.

Study the given given Venn diagram diagram :

24.

4

Study the given owchart carefully. carefully.

4 Germination of

seeds Melting

are respectively P , Q, R and S are A. Salt, sawdust, iron dust, camphor B. Sawdust, iron dust, camphor, salt C. Iron dust, camphor, sawdust, salt D. Camphor, iron dust, sawdust, salt.

of ice

Tearing a paper into pieces Burning of a candle

27.

Smita took a spoon spoon of turmeric turmeric powder powder and made made a paste by adding addi ng litt le water to it. She cut thin stripes stri pes of a paper pape r and applied appl ied this paste on them . Afte r dryi ng she put few drops of given sample solutions (i)-(iv) on these strips. What would be the changes in the colour she observed? (i) (ii) (iii) (iv) A. B. C. D.

Mixing magnesium oxide with water Brown deposit on iron nail kept in copper sulphate solution Carbon dioxide is passed through lime water Absorption of ultraviolet radiations by ozone. ozone. P-(v), Q-(vii), R-(i), S-(vi) P-(iv), Q-(ii), R-(i), S-(iii) P-(ii), Q-(iii), R-(viii), S-(vii) P-(ii), Q-(iv), R-(viii), S-(vi)

R. S. A. B. C. D. 26.

23.

Match the given given chemical chemical reactions with the the products products listed in the box and select the correct option from the given codes. (i)-CaO; (ii)-Mg(OH)2; (iii)-NO2 (iv)-Cu (v)-MgCl2; (vi)-O2; (vii)-Fe2O3; (viii)-CaCO3

Which of the following statements statements is/are is/are correct? correct? I. Coffee is bitter in taste hence, it is basic in nature. II. All mineral mineral acids are strong acids. acids. III. Phenolphtha Phenolphthalein lein is is a synthet synthetic ic indicator indicator.. IV. IV. In neutralisation neutralisation reaction, heat is always evolved. evolved . V. If the soil is too basic, organic matter is added to it. A. III, IV and V B. I, III and V C. I, III and IV D. III only

Points 1, 2, 3 and 4 represent 1 2 3 Burning of a A spinning A. Folding a paper to cracker top make boat Burning of B. Growth of Cutting a plant of a tree cooking gas Ination of C. Setting of Melting of ice milk to tyre form curd Bursting of a D. Change of Rising and seasons setting of sun balloon

Oxygen, butter paper and milk Chlorine, glass jar and water.

S.No. I.

The properties properties of substances substances X , Y and and Z are are given as : X : : Gas, transparent, colourless : Solid, translucent, insulator Y : : Liquid, opaque, edible Z : and Z are are respectively X , Y and A. Water vapour, petrol and mercury B. Fog, frosted glass and muddy water

Processes

Sublimation Sublimation of naphthalene naphthalene balls

Heating of sodium with chlorine gas III. Mixing sodium hydroxide with copper sulphate solution IV. IV. Expan Expansi sion on of bime bimeta tall llic ic strip strip V. Extraction Extraction of a metal by electrolysis electrolysis II.

Sample solution

Amla juice Turmeric paper Lime water Common salt solution Baking soda solution (i)-Yellow, (ii)-Red, (ii)- Red, (iii)-Y (iii) -Yellow, ellow, (iv)-Red (iv)- Red (i)-Red, (i)-Re d, (ii)-Y (ii)- Yellow, (iii)-Y (iii) -Yellow, ellow, (iv)-Red (iv)- Red (i)-Red, (ii)-Red, (iii)-Yellow (iii)-Yellow,, (iv)-Yellow (iv)-Yellow (i)-Yellow, (ii)-Y (ii)- Yellow, (iii)-Red, (iii) -Red, (iv)-Red (iv)- Red

Kunal has has classied classied a few processes processes as as shown in the given table : Type of change Chemical Chemical

Physical Chemical Chem Chemic ical al Physical

The processes which are classied incorrectly are A. II, IV and V only B. III and V only C. I, II, IV and V only D. All of these. 28.

During the science activity, class teacher arranged the test tubes as shown in the gure and asked students to predict the effect of various indicators on the given solutions. Soap solution (1)

Cold drink (2)

10 mL NaOH NaOH + 10 mLHCl

Soda ash + water (3)

(4)

Which of the following statements are correct? | 19th NSO | Class-7 | Set-A | Level 1

I.

Turmeric solution will turn red in test tubes 1 and 4.

C.

II. II.

Methyl Methyl orange orange will turn yellow in test test tubes 1 and 3. China rose indicator will turn dark pink in test tube 2. Blue litmus litmus solution solution will will turn red in test tubes tubes 1 and 4. I and IV only B. I, II and IV only II and III only D. None of these

D.

III. III. IV. IV. A. C. 29.

30.

Refer to the the given gure and select the correct option. A. Joint X is similar to join t Y whereas joint W is is similar to joint Z . B. Joints U and V are xed joints where bones do not show movement. C. Joints Y and and Z allow allow movement in only one plane, i.e., either back and forth or up and down. D. None of these Refer to the given gure and select the correct option regarding P , Q, R, S and T . A.

B.

C.

D.

31.

P

32.

Refer to the given food web.

Which of the following holds true regarding this? A.

X

B.

Y

C.

W U

D.

Z

V

33.

R

Q In pea, R is modified into S tendril to give support whereas in Venus ytrap, S is modied to catch insects. R is modied into spines to T prevent water loss whereas performs photosynthesis S performs in Opuntia. T is modified to store food in turnip and ginger whereas outer covering of P is is edible in cardamom. Q is modied to store food in cabbage, broccoli and lettuce.

Two Two friends friends Rohan Rohan and Ravi visited visited a general general physician physician for their respective diseases. Doctor examined them and prepared a chart as shown below to keep a record of their illness. Name of Symptoms Treatment the patient of disease Rohan Spongy and Intake of citrus bleed ing gums fruits and amla Ravi Body fatigue, Intake of green palen ess of leafy vegetables face and nails (like spinach) and red meat

teeth.

B.

C. D. 34.

B.

Plant P derives derives nutrition from the host plant with the help of haustoria and possesses hygroscopic roots which absorb moisture directly from atmosphere. Plant Q possesses broad thin leaves with supercial stomata.

19th NSO | Class-7 | Set-A | Level 1 |

There are four primary consumers and one secondary consumer in the given food web. There are two herbivores and two carnivores in the given food web. Snake is serving as both primary and secondary consumer in this food web. If grasshopper and beetle population is removed from this community then frog population will be affected negatively. negatively.

Refer to the given chart and select the correct option regarding this. A. Rohan is suffering from deciency of a fat soluble vitamin which helps in formation of bones and

Refer to the given ow chart and select select the correct option regarding P , Q, R and S .

A.

Plant R possesses special leaf modications to catch and digest insects. Plant S possesses possesses stilt roots which help in aeration.

Ravi is suffering from deciency of a mineral that is required for formation of haemoglobin that carries oxygen from lungs to body cells. Rohan is suffering from deciency of a mineral that also increases immunity against various diseases. None of these

Read the the following following statemen statements ts carefully carefully and and select select the the option which correctly identi es the true (T) and false (F) statements. (i) Synthetic bres are the bres that are made from chemicals. (ii) (ii) Cashmere wool is obtained from cashmere rabbit. (iii) Anthrax is an occupational disease disease caused caused by a bacteria Bacillus anthraci s. (i) (ii) (iii) A. T F T B. F F T C. T T F D. F T T 5

35.

Farheen soaked some bean seeds in water overnight. Next morning morni ng she drained the water and kept the seeds moist till they started germinating. She boiled half of the seeds and then kept the germinating seeds in one thermos ask X and and the boiled seeds in another thermos ask Y . She covered the mouth of both asks with moist cotton wool. Then she inserted thermometers in both asks and left them. What would be her observation after four hours? A. B. C. D.

Refer to the given dichotomous key. key.

I.

III.

(a) (b) (a) (b) (a)

Fibre obtained from natural resources – Go to II Fibre obtained from chemicals – P Plant bre – Go to III Animal bre – Go to IV Fibre obtained from seeds of plants – Q

IV. IV.

(b) (a)

Fibre obtained from stem of plants – R Fibre obtained from mammal – S

(b)

Fibre obtained from insect – T

Well

Wel l 1

P

R Other gases

Which of the following statements is correct regarding gases P , Q and R?

(i)

P can can be xed in soil by certain bacteria present in roots of leguminous plants. (ii) P supports supports combustion whereas Q and R help in extinguishing re. (iii) Plants and animals release R in respiration whereas plants use Q in photosynthesis. (iv) R entraps sun's heat and makes earth warm and hospitable. A. (i) and (iv) only B. (ii) and (iii) only C. (i), (ii) and (iv) only D. (iii) only

6

2

3

We ll 2

Wel l 3

A.

Mouth Mouth cavity cavity

Small Small intestin intestinee Stomach Stomach

B.

Mout Mo uth h cavi cavity ty

Stom Stomac ach h

C.

Small Small intestin intestinee Mouth Mouth cavity cavity

Stomach Stomach

D.

Stom Stomac ach h

Smal Smalll inte intest stin inee

Mout Mo uth h cavi cavity ty

Smal Smalll inte intest stin inee

39.

Refer to the given diagram which shows a test tube containing blood with its components arranged Layer X X in layers ( X , Y and Z ) after it Layer Y Y had been stirred thoroughly for Blood Layer Z Z 5 minutes in a process known as centrifugation. (In centrifugation, the heavier components sink to the bottom bott om of the test tube while whil e the t he lighter ligh ter compo nents rise towards the surface). Now, select sel ect the c orrect orre ct st atement ateme nt r egarding egard ing layer s X , Y and Z . A. Layer X represents represents blood plasma, layer Y is is chiey constituted by red blood corpuscles whereas layer Z contains contains blood platelets. B. Layer Y would would be absent or greatly reduced in case of blood sample obtained from person whose blood does not clot easily. easily. C. Layer Z is is chiey composed of water, enzymes, hormones etc. D. Layer X possesses possesses haemoglobin responsible for oxygen transport in human body.

40.

Shruti planted many plants belonging to two separate species X and Y in her garden. She watered them regularly and took proper care of them. Plants of both species speci es owered ow ered.. After someti s ometi me Shr uti notic n oticed ed that only plants belonging to species X yielded yielded fruits whereas fruit setting was absent in plants of species Y . What could be the probable reason for this?

The given diagram shows percentage composition of gases P , Q, R and other gases present in air. Q

1

Colour of iodine Blue-black Yellow - Yellow solution brown brow n brown brow n Which of the following correctly identies the regions of the alimentary canal from which the three digestive juices juic es were we re obtain o btain ed? ed ?

Which of the following is incorrect regarding P , Q, and T ? R, S and is a petroleum based bre which does not absorb A. P is water readily. B. Both bres Q and S are are obtained from their source organisms without harming them. Q is separated from seeds by retting whereas R is C. separated from stems by ginning. can be obtained from the same animal again and S can D. again whereas T can can be obtained from an animal only once in its lifetime. 37.

Digestive juices were collected from three different regions of the alimentary canal. Drops of these juices were added to wells made in an agar of starch as shown below. After an hour, the wells were rinsed with distilled water and ooded with iodine solution. The results are shown below.

Temperature of ask X increases because it has photosynthesising seeds. Temperature of ask X increases because it has respiring seeds. Temperature of ask Y increases increases because it has boiled seeds. Both B and C

36.

II.

38.

A. B. C. D.

Plants of species X are are wind pollinated but plants of species Y are are insect pollinated. Species X is dioecious whereas species Y is monoecious. Plants of species Y present present in Shruti's garden are dioecious male plants. Plants of species X bear bear only unisexual female owers whereas plants of species Y bear bear bisexual owers. | 19th NSO | Class-7 | Set-A | Level 1

41.

42.

The leaves leaves of a green bean pl an t we re ex po se d to carbon dioxide containing the radioactive isotope of carbon 14C for few hours in sunlight. A section of the plant's stem was then immediately obtained and placed on an X-ray lm that blackens where exposed to radioactivity. The following diagrams show the cross-section of the stem, and the resulting autoradiograph. autoradiograph. Why is structure P shown radioactive? transported radioactive carbohydrates from leaves A. P transported to other plant parts. B. Radioactiv e carbon dioxide gets dissolved in cell sap and is transported along with water and minerals by structure P . C. The radioactive carbon is incorporated only in the tissues constituting structure P . D. None of these

B.

C.

D.

44.

Read the given paragraph with few blanks. (i) body of birds reduces resistance offered by wind. Their (ii) are modied into wings which help them in flight. Birds have (iii) bones which make their body light. ligh t. Birds are (iv) and maintain mainta in constant body bod y temperature. (v) are attached to their lungs which serve as reservoirs of air. Birds maintain equilibrium in ight due to well developed (vi) of brain. Select the option that correctly fills any 3 of these blanks. blan ks. A. (i) Spindle shaped, (ii) Hindlimbs, (vi) Cerebrum B. (ii) Forelimbs, Forelimbs, (iv) Homeothermic, Homeothermic, (vi) – Cerebellum Cerebellum C. (i) Radially Radially symmetrical, (iii) Pneumatic, (v) Air sacs D. (iv) Poikilothermic, (v) Air sacs, (vi) Cerebrum

45.

Read the given paragraph. paragraph. and Z are are three methods of waste management. X X , Y and requires action of biological agents whereas Y and and Z are chemical processes. Both X and and Y reduce reduce the waste volume whereas Z makes the waste reusable. Which of the following is incorrect regarding X , Y and Z ? enriches the soil with nutrients and helps in A. X enriches recycling of matter between living organisms and their environment. generates gases and heat energy and is best suited Y generates B. for disposing toxic waste. Z increases C. increases the demand and supply of fresh raw material and causes air and water pollution. D. Saprophytes and detritivores play a major role in X .

Refer to the the given given Venn diagram diagram and identify P , Q, R and S . A.

B.

C. D.

P – – Paramecium , Q – Scoliodon , R – Spiny ant eater, S – – Lung sh P – Lion tailed macaque, Q – Salmon, R – Dolphin, – Platypus S – P – – Earthworm, Q – Rohu, R – Blue whale, – Frog S – – Snake P – – Amoeba , Q – Tadpole, R – Trout, S –

43. A handful of soil was mixed in water and left in a jar for some time. Different components of soil got segregated and formed layers, as shown in the given X Y gure. Z Select the correct option regarding layers X , Y and and Z . A. Soil sample having high amount of X than Y and and Z is is best suited for maize cultivation.

Soil sample having almost same amount of Y and Z and and comparatively much less amount of X has highest percolation rate and water absorbing capacity. Soil containing more amount of Z and and very little X and Y is prominent in areas where Kangaroo rat and Acacia are commonly found. The space between particles is very large in X however particles are small sized and compactly arranged in Y and and Z .

ACHIEVERS SECTION

46.

Observe the given given gure carefully and ll in the blanks by choosing an appropriate option.

A. B.

p Crys Crysta tall llis isat atio ion n

Sublimation

C.

Melting

D.

Crys Crysta tall llis isat atio ion n

q Iron Iron

r Chem Chemic ical al,, reversible Zinc Physical, irreversible Copper Physical, reversible Iron Iron Chem Chemic ical al,, irreversible

19th NSO | Class-7 | Set-A | Level 1 |

47. Which of of the following statements statements is correct for the given circuit diagram?

s Iron oxide

A.

Zinc

B.

oxide Copper oxide Copper

C.

To convert the electrical energy into heat energy, energy, only switch R should be closed. Minimum number of switches needed to be closed for conversion of electrical energy to sound energy is two. To convert the electrical energy to light energy, only switches S and and Q should be closed. 7

D.

48.

If electrical energy is being converted to sound energy and heat energy, then conversion to ligh t energy is also taking place.

Refer to the given food web.

Which of the following graphs best illustrates changes in sh and penguin population over time if whale population is removed from this community?

Process III

zi s s n o

n

B. it

Y

X

I s s e c o r P

o it la

u u p p o P

o

Time P

e

e i

i

Time

P r o c e s s I I

z z s s n

C.

n

Process V o

D. o i t

i t al

la u u p p o o P

49.

50. Refer to the given given diagram showing a natural natural cyclic process. proc ess.

e iz

la

whereas proteins Two should be replaced by four whereas prote ins should not be replaced as it is correctly mentioned. Fats should be replaced by carbohydrates and B. pancreas should be replaced by liver . Digests should be replaced by emulsifes. C. D. Large should be replaced by small . A.

V I s s c e o r P

e

A.

Most absorption of water occurs in large intestine. Select the correct option regarding this.

Time

P

Time

Read the given paragraph where few words have been italicised. Buccal cavity of humans contains two pairs of salivary glands which secrete digest ive juices that help in pro tei ns present in food. From here food digestion of protei enters stomach where digestion of mainly fats fa ts takes place. As this semi-digested semi-dige sted food enters small intestine complete digestion of food occurs. Small intestine receives bile juice from pan cre as which digests fats.

Which of the following holds true regarding it? A. B.

C. D.

Deforestation will decelerate process V. Process I occurs at a high rate in a rainforest and is absent in deserts whereas process III is involved in dew formation. The physical state of water at X is is liquid and that at is gaseous. Y is Both processes II and IV involve conversion of one physical state of water into another. another.


8

| 19th NSO | Class-7 | Set-A | Level 1

Class 7

Set B Year 2016

LOGICAL REASONING

1.

Pointi Pointing ng to to a photog photograp raph, h, Mini Mini said, said, "She "She is the the mother mother of my only brother's uncle's son ." How is Mini related to the person in the photograph? A. B. C. D.

2.

Aunt Niece Mother Daughter

C.

6.

Select a gure from the options which will substitute the (?) so that a series is formed by the Problem Figures.

3.

A.

B.

C.

D.

8.

9 2 4 4 5 4 7 4 2 9 8 7 4 7 3 4 5 2 1 4 1 3 4 4 4 8 7 3 3 9 1 1 4 2 1

4.

5.

B. D.

Three Three of of the the follo followin wing g four four grou groups ps of of lette letters rs are are alik alikee in some away while one is different. Find out which one is different.

9.

10.

AGDKB CIFMD EKHOF JPMSK

Which Which of of the the follo followi wing ng Ven Venn n diagr diagrams ams correc correctly tly represents the relationship amongst "Rivers, Oceans, Water sources"? A.

B.

C.

D.

Select the option option in which only specied specied components of the Fig. (X) are found.

X T

In whic which h of the follow following ing option options, s, Fig. Fig. (X) is exac exactly tly embedded as one of its part?

A.

2

M S

Selec Selectt the corre correct ct wate waterr image image of the the give given n combi combinat nation ion of letters and numbers. 5N6OMAT

A. B. C. D.

7 6 5 4

If it it is pos possi sibl blee to mak makee a mean meanin ingf gful ul wor word d with with the rst, fourth, fth and eighth letters of the word HYPOTHESIS which of the following will be the third letter of that word ? If more than one such word can be formed, form ed, give 'X' as the answer. answe r. If no such word can be formed, give 'M' as the answer. A. C.

West South-West South North-West

A. B. C. D.

How many many such such 4's are there there in in the the foll followi owing ng sequ sequenc encee that the sum of the immediately following two digits is greater than the sum of the immediately preceding two digits?

A. B. C. D.

Ahika Ahika is is stan standin ding g to the North North of Sumi Sumit. t. Priy Priyank ankaa is standing to East of Ahika. Puneet is to the West of Sumit. What is the position of Puneet with respect to Priyanka? A. B. C. D.

7.

D.

B.

A.

B.

C.

D.

| 19th NSO | Class-7 | Set-B | Level 1

SCIENCE

11. 11.

12.

13.

Which Which of the the follow following ing diagr diagrams ams best best depic depicts ts the the situation when two long iron rods are placed at the ends of a very short bar magnet? A.

B.

C.

D.

A. B. C. D. 16.

The end end of a cyclone cyclone comes comes quickly quickly if the cyclone cyclone moves over A. Sea B. Lake C. Land D. Cloud. Four magne magnetic tic mate material rialss are used used to pick pick up up metallic metallic paper clips after they were taken out from a coil which is connected to a strong direct current. The numbers of paper clips picked picke d up u p by b y the t he four magnetic magne tic materials mater ials are listed here: Magnetic material

Number of paper clips picked up

P Q R S

0 5 10 20

Which is the best magnetic material to be used as an electromagnet? A. P B. Q C. R D. S 14.

If an observer peeps through the hole at the mirror, the extent to which he can see the metre ruler is between the_________.

Which Which of the follow following ing state statemen ments ts does does not illust illustrat ratee uniform motion? A. B. C. D.

A boy runs 80 80 m along a straight track at a constant constant speed. A stone is thrown upwards with a speed of 10 m s –1. A ball moves along a frictionless frictionl ess surface without any external force. An aeroplane flying with a constant speed of 250 m s –1 at an altitude of 1000 m.

Two parall parallel el rays rays of light light strike strike a conve convex x lens. lens. Which Which of the following correctly shows the passage of the rays after passing through the lens?

A.

B.

C.

D.

17. Some Some stea steambo mboat at rest restau auran rants ts use use Paper pot paper pots for their customers to heat the food themselves. What Flame is the reason for the paper not to catch re when in contact with the ame? (i) The paper is thin and therefore heat is conducted quickly to the water in the paper pot. (ii) Wa Water ter has a boiling point lower than the burning temperature of the paper. (iii) The paper is thick enough to withstand the high temperature of the ame. A. (i) and (ii) only B. (i) and (iii) only C. (ii) and (iii) only D. (i), (ii) and (iii) 18.

Study the the classicati classication on carefully carefully and select select the correct correct option for X , Y and and Z . Electrical Energy Television Radio X

15. The diagra diagram m shows shows a metr metree rule rulerr XY X Y with a small hole drilled at the 30 cm mark. A plane mirror MN is placed in front of the ruler and is parallel to it.

A. B. C. D. 19.

19th NSO | Class-7 | Set-B | Level 1 |

0 cm and 90 cm mark 10 cm and 70 cm mark 20 cm and 50 cm mark 15 cm and 60 cm mark

X Refrigerator Music system Walkman Wa lkman Air-conditioner

Electric bulb Toaster Torch light Rice cooker Y

Z

Y Clock Washing machine Table Table lamp Heater

Z Microwave Heater Electric kettle Hair drier

The lengt length h of mercur mercury y thread thread in a mercury mercury thermome thermometer ter is 2 mm at the ice point and 26 mm at the boiling point poin t of water. What will be the length leng th of mercu ry thread in this thermometer if it is used to measure a temperature of 75°C? A. 18 mm B. 20 mm C. 22 mm D. 24 mm 3

20. The given diagram shows a ba ll re le as ed fr om th e to p of a smooth ramp, which reaches a flat and smooth horizontal surface connected to the ramp. Which of the following speed-time graphs best represents the motion of this ball? Speed

Speed

A.

24.

Spee

C.

D.

25. Time

Time

23.

D.

Time

Speed

22.

C.

B. Time

21.

B.

Ms. Kritika, Kritika, a science teacher demonstrated an activity in the class. She burnt a thin strip of magnesium and collected the powdery ash in a China dish. Then she mixed some water and tested the mixture with various indicators. Which of the following observations are correct? I. The colour of China rose indicator changed to green. II. The colour of turmeric paper changed to blue. III. Red litmus changed to blue. IV. IV. Colour of methyl orange changed to yellow. yellow. A. I, III and IV only B. II and III only C. III and IV only D. I and II only The given diagram shows burning of sulphur : After heating sulphur for few minutes, it melts Sulphur (process I) and then Bunsen burner vaporises (process II). After this, vapour ignite and burn with oxygen to form sulphur dioxide (process III). Identify the types of changes taking place in these processe proc esses. s. A. Processes I and III are chemical changes while II is a physical change. B. Processes II and III are chemical changes while I is a physical change. C. Process III is a chemical change while processes I and II are physical changes. D. All are chemical changes. The following activity was performed to check the solubility of various liquids in water :

(I)

(II)

(III)

Q R

The given given table shows the the properties properties of four four substances substances K , L, L, M and N :

K L M N

White Blue White Black

Magnetic

Salty Sweet Sweet Metallic

No No No Yes

Dissolves in water Yes No Yes No

Which two substances would be most difficult to separate when mixed in water? A. K and L and L B. K and M and M C. L and L and M M D. M and N and N 26.

Consider the following statements : I. Baking soda is an acidic salt whereas common salt is a basic salt. II. The water extract of spinach does not change the colour of red litmus solution. III. Organic matter neutralises the acidic nature of the soil. IV. IV. Lime water is acidic in nature. The incorrect statement(s) is/are A. I, II and IV only B. II, III and IV only C. I, III and IV only D. II only. only.

27.

Observe the given gure carefully and identify the

r

substances marked as p as p,, q

q

and r .

p

A. B.

p Baking soda Magnesium

C. D.

Splinter burning with a pop sound

Calcium carbonate Zinc

q Vinegar Vinegar Hydrochloric acid Hydrochloric acid Hydrochloric acid

r Carbon dioxide Chlorine

Carbon dioxide Hydrogen

Study the given Venn diagram :

(IV)

Which of the following observations observations is correct? A. Two separate layers will be formed in beakers I and II and liquids are completely miscible. 4

P

Cooking oil

Petrol

Vinegar

Which portion of the ship will rust the fastest? A. P B. Q C. R D. P , Q and R and R will will rust equally.

Substance Colour Nature

28. Lemon juice

Components will mix well in beakers III and IV as they are completely miscible. Vinegar Vinegar will disappear completely in beaker II as it is a miscible liquid. Cooking oil will form a separate layer below water in beaker IV.

Centre point P ' P ' represents | 19th NSO | Class-7 | Set-B | Level 1

A. B. C. D. 29.

Rusting of iron Eruption of volcanoes Ripening of a fruit Burning of cooking gas.

32. Divya Divya set up an experi experimen mentt Thermometer in an open eld as shown here to study how temperature affects Inverted test tube the rate of photosynthesis. She left the apparatus in eld from Funnel 7 am in the morning till 1 pm Pond in afternoon and tabulated her weed observations which were later Plasticine support plotted plot ted on a graph. grap h. Which of the following graphs shows the result of her experiment? s

The given table classies ve animals P animals P , Q, R, R, S and and T according to their feeding habits. These animals live in the same habitat. Carnivore S

Omnivore P Q

Herbivore R T

T P

Q

Plant

Plant

C.

30.

S

A.

S

R

P

W

X

m 2 u 0 N

s

Z

Brown

Bluish black

Brown

(ii) (ii) Bene Benedi dict ct's 's test (iii) (iii) Copper Copper sulpha sulphate te + Caustic soda test ( iv iv) Ethanol test

Orange

Blue

B l ue

B l ue

B l ue

Purple

B l ue

Pur ple

A. B. C. D.

X could could be Scoliodon, Scoliodon , Z Body is Exoskeleton Y could could be pigeon and X streamlined comprises Z could could be tortoise. scales Y Y is warm blooded whereas X and Z are Exoskeleton comprises cold blooded animals. feathers X could could be a sh or a reptile. Y possesses possesses hollow bones and air sacs. X has two chambered heart, Y has three chambered heart and Z and Z has has four chambered heart. (i) and (iv) only (i), (ii), (iii) and (iv) only (ii), (iv) and (v) only (i), (ii) and (v) only


N

20 253035 40455055 Temperature (°C)

0

20 25303540455055 Temperature (°C)

u 8 b

D.

f 6 o

r 4 e m 2

33.

0

20 253035 40455055 Temperature (°C)

Refer to the the given given ow chart and identify identify P P , Q, R , S and T .

Colour le less Emul si sion Colour le less Colour le less

Refer Refer to the given given Venn Venn diagra diagram m and select select the the correct correct statements regarding X , Y and Z .

(iii) (iv) (v)

u

b

A.

Which of the following correctly identies W , X , Y and Z ? A. W – – Sugar, X Sugar, X – – Egg, Y – – Potato, Z Potato, Z – – Soyabean B. W – – Pulses, X Pulses, X – – Cabbage, Y – – Butter, Z – – Jam C. W – Milk, X Milk, X – – Orange, Y – – Peanuts, Z Peanuts, Z – – Paneer D. W – – Cheese, X Cheese, X – – Potato, Y – – Honey, Z Honey, Z – – Meat

(ii)

m 2

b

T

Brown

(i)

b

b 10

C.

Q

Y

r 4 e

el

Iodine test

31.

r 4 e

N

S

f 6 o

B.

f 6 o b

The given given tabl tablee shows shows some obse observa rvatio tions ns of food food test experiments. Food sample Test

(i )

T

P Q

u 8 b

u 8 b

u

D. R

b

b 10

b

R

Plant

B.

le

b 10

el

Which of the following shows their correct interlinking with respect to their feeding habits? A.

s

B. C. D. 3 4.

P - Pea, Q - Opuntia, Opuntia , R - Aloe, Aloe, S S - Utricularia, Utricularia , T - Lettuce P - Grapevine, Q - Ac ac ia , R - Coleus, Coleus , S Dionaea, Dionaea , T - Passion ower P - Gloriosa, Gloriosa, Q - Aloe - Aloe,, R R - Opuntia, Opuntia, S - Nepenthes - Nepenthes,, T - - Bryophyllum P - Bottle gourd, Q - Cactus, R - As parag pa rag us, us , S - Drosera, Drosera , T - Coleus

T h e g iv i v en e n g ra r a ph p h s ho h o ws w s t he he amount of water absorbed by four fabrics P , Q, R R and S of same size when put in four separate beakers each containing 100 mL of water. Identify P Identify P , Q, R and R and S and and select the incorrect option regarding them. A. R R can be worn close to skin because static electricity does not build up readily. B. Fibres of Q consist of keratin protein, bres of S consist of broin protein, bres of R of R are are cellulosic in nature whereas bres of P are obtained from petrochemicals. C. Fibre of S is is the strongest natural bre. D. Fibres of P of P and and Q are animal bres whereas bres of R of R and and S are are plant bres. 5

35.

Read Read the given given stateme statements nts and selec selectt the option option whi which ch correctly lls the blanks in any two of these statements. (i)

Paramecium Parame cium has has stiff hair-like structures called ____ ___ all over its body, bod y, which whi ch are used use d for _______. (ii) Hydra has a number of _______ around its mouth, that entangle small aquatic animals and kill them with their _______ cells. (iii) Frog uses its long, sticky_______ to catch catch insects. (iv) Mosquito sucks up the blood of animals with its _______. A. (ii) - Cilia, Absorptive; (iii) - Limb B. (i) - Tentacles, Tentacles, Ingestion; (iv) - Feeding tube C. (i) - Cilia, Ingestion; (ii) - Tentacles, Tentacles, Stinging D. (iii) - Tongue; Tongue; (iv) - Pseudopodia 36.

39.

Siddhi set up up an experiment experiment as shown shown here to investi investigate gate fermentative activity in yeast.

A.

B.

Yes, as it is a characteristic of pure wool. No, as it is a characteristic of synthetic yarn. Yes, as it is a characteristic of pure silk. No, as it is a characteristic of cotton.

C.

D.

Refer to the given ow chart and select the correct correct option regarding P regarding P , Q, R and R and S . Food item Yes

P could could be plastic bag or styrofoam cup whereas Q could be vegetable peel or tea leaves.

Which of the following holds incorrect regarding the given experiment?

Your mother mother goes to buy buy a woolle woollen n shawl shawl from from the the market. The shopkeeper takes out a small strand of yarn from the shawl and burns it. It smells like a burning plastic. plas tic. Will it be a good decis ion to buy this shawl and why? A. B. C. D.

37.

D.

40.

Obtained from plants Yes

The balloon balloon of setup II got inflated due to accumulation of a gas which gives white precipitate when bubbled through calcium hydroxide solution. The balloon in setup I does not inate as boiled yeast cannot respire. Most of the sugar solution is converted to ethyl alcohol in setup II due to anaerobic respiration of yeast. In setup I, yeast respires only aerobically whereas in setup II yeast undergoes both aerobic and anaerobic respiration.

Refer to the given given ow chart and and select the correct correct option regarding W , X , Y and Z . Human blood

Yes

P Rich in carbohydrates No Yes Q Rich in fats No Yes R Rich in iron No Yes S Rich in vitamin C

A. B. C. D.

C.

6

Q could be vermicomposted or burnt. Hospital waste belonging to category P is recycled whereas that belonging to category Q is incinerated. Reduction in amount of P of P with with time is synchronised with nutrient enrichment of ground soil.

Corpuscles

Contains mostly water

X

Y

Z

Transports oxygen Fights Forms clots throughout infection and prevents body blood loss

A.

P could could be honey or sugarcane whereas Q could be soyabean or maize. R should R should be taken in large quantities by patients suffering from goitre. Deciency of S leads leads to bleeding gums and swelling of joints. Q should be taken in large quantities by patients suffering from kwashiorkor.

38. The giv given en gra graph ph show showss the cha chang nges es in amount of solid wastes P wastes P and and Q dumped on an open ground over time. Select the correct statement regarding P regarding P and and Q. A. B.

W

B. C. D.

X is is enucleated, biconvex and contains r ed pigment haemoglobin. X count goes up in case of anaemia whereas Y count goes down in case of common cold. Z can change its shape and shows amoeboid movements. X , Y and Z remain suspended in W along with enzymes, proteins, hormones, etc.

41. 41.

Refer Refer to the the given given dicho dichotom tomous ous key key and ident identify ify P , Q, R R and S .

I.

(a)

It is a owering plant. - Go to II

(b)

It is a non - owering plant. plant. - Go to III

(a) (a)

Propa Propaga gate tess vege vegeta tati tive vely ly by leav leaves es.. – P

(b)

Propagates vegetatively by stem. – Q

(a)

Reprod Reproduce ucess asexua asexually lly by fragme fragmenta ntatio tion. n. – R

(b)

Reproduces asexually by spores. – S

A.

P - Bougainvillea - Bougainvillea,, Q - Poppy, R Poppy, R - Sphagnum, Sphagnum, S - Spirulina

II. II. III.


B. C. D.

P - Begonia, Begonia, Q - Strawberry, R Strawberry, R - Spirogyra, Spirogyra, S - Marchantia P - Bryophyllum, Bryophyllum , Q - Passion ower, R R - Chrysanthemum, Chrysanthemum, S - Funaria P - Bottle brush, Q - Dahlia, Dahlia, R R - Candytuft, S - Jasmine

B. C. D. 44. 44.

42.

Refer Refer to the the given given diagram diagram and select select the correc correctt option regarding processes P , Q and R. R.

Which Which of the the follow following ing is not not true true regardi regarding ng the the adaptations shown by different animals? A.

B. C.

A.

B. C.

D.

Processes P Processes P , Q and R and R introduce introduce genetic variability in the offspring of sexually reproducing plants X and Y . Wind serves as agent for processes P and Q in case plants X plants X and and Y belong belong to genus Salvia. Salvia . Flowers of plant X and and Y need to produce odour and nectar for completion of processes P and Q if they are rose species. If plants X plants X and and Y are are of maize species, then their owers need to produce sticky and heavy pollens in very small amount for accomplishment of process Q.

D.

45.

In areas experiencing extremes of temperature, contraction and relaxation of rocks aids in Z . Phenomenon X Phenomenon X can can be checked to some extent by terrace and contour farming. Y could could be afforestation, oods or forest re.

Jaguar has spotted skin, which merges well with the speckled shadows of the rainforest oor, making it difcult to be spotted. Toucan Toucan uses its long, large bill to reach fruits on weak branches that cannot bear its weight. The lion-tailed macaque has long and sticky tongue which helps it to catch insects. Seals have a thick deposition of fat called blubber that protects them from cold.

The given given grap graph h shows shows changes changes in the the volume volume of of thoraci thoracicc cavity in a normal human being while breathing.

Select the correct option regarding this. A. From X From X to to Y , pressure in lungs increases whereas from Y to Z to Z pressure pressure in lungs decreases. B. From X to Y , ribs move upward and outward whereas from Y to Z ribs move downward and inward. C. At point Y diaphragm diaphragm is dome shaped whereas at points X points X and Z and Z it it is at. D. X to to Y represents represents exhalation and Y to Z to Z represents represents inhalation.

43. Read Read the given given parag paragrap raph. h. X is a natural phenomenon which causes soil erosion mostly in hilly areas whereas Y is an anthropogenic cause contributing to erosion. However, Z is is a natural phenomenon contributing to soil formation. Select the incorrect option regarding X , Y and Z and Z . A. Lichens are biological agents responsible for phenomenon Z phenomenon Z .

ACHIEVERS SECTION

46. The diagr diagram am shows shows three three ident identica icall light light bulbs bulbs X , Y and Z , connected in a circuit.

47. 47.

Some examples examples of commo common n househo household ld items items are are given : (a) (c) (e) (f) Fill

What will happen to the brightness of the bulbs if a similar bulb is connected in series with the bulb X ? X ? X

Y

Z

A.

Dimmer

Dimmer

Brighter

B.

Dimmer

Brighter

Dimmer

C.

Brighter

Dimmer

Brighter

D.

Brighter

Brighter

Dimmer


Soda water (b) Sour milk Sugar solution (d) Window cleaner Toothpaste Common salt solution in the blanks by choosing an appropriate option.

With solutions I methyl orange changes to red colour, with solutions II China rose indicator changes to green colour while with solutions solutions III red or blue litmus paper do not show any colou r change. chang e. A. B. C. D.

I I I I

– – – –

(c), (d); II – (f), (e); III – (a), (b) (a), (b); II – (d), (e); III – (c), (f) (d), (f); II – (c), (b); III – (a), (e) (a), (e); II – (b), (d); III – (c), (f) 7

48.

Refer to the given gure of human digestive system and select the correct statements regarding parts labelled P , Q, R R and S . (i)

(ii)

(iii) (iv)

(v) (vi) A. C. 49.

P and R R secrete and pour their digestive enzymes in Q for digestion whereas Q secretes HCl which kills germs in food. Digestion of both carbohydrates and proteins takes place in Q whereas digestion of only fats takes place in S . Q, R and R and S secrete secrete digestive enzymes but P only only stores a digestive juice that emulsies fats. S does not secrete any digestive enzyme but receives digestive enzymes of P , Q and R R for complete digestion of food. If P If P is is removed in a person then he cannot digest fats present in his food. Q secretes digestive enzymes and mucus whereas R secretes R secretes digestive enzymes and hormones. (ii), (iv) and (v) only B. (iii) and (vi) only (iv), (iv ), (v) and (vi) (vi ) only onl y D. (i), (iii) (iii) and (v) only only

Read Read the give given n paragr paragraph aph wher wheree few word wordss have have been been italicised. Waste Wa ste water treatment plant involves physical, chemical and biological processes. First the waste water is made to pass through bar screen screen where liquid materials are

removed. Then water is allowed to go into grit tank where speed of waste water is increased so that that light objects settle at bottom. Then water enters sedimentation tank where sludge sinks slowly at the bottom which is continuously removed by skimmer . Water then enters aeration tank aeration tank which contains anaerobic bacteria. anaerobic bacteria. Select the correct statement regarding this. A. B. C. D.

50.

Bar screen screen should be replaced by by digester and liquid should be replaced by solid by solid . The positions of grit and aeration should be interchanged. Increased and light and light should not be replaced as they are correctly mentioned. Skimmer should be replaced by sc ra per pe r and anaerobic should anaerobic should be replaced by aerobic. aerobic.

Refer Refer to the given given food web and and select select the correc correctt option regarding it.

A. B. C. D.

There are 8 food chains in the given food web. There are 4 primary consumers and 3 secondary consumers in this food web. Owl and wolf serve as secondary as well as top consumers in the given food web. There are only two top consumers in the given food web.


8


Class 7

Set A Year 2017

LOGICAL REASONING

1.

In a certa certain in code code langua language, ge, 'CIRC 'CIRCULA ULAR' R' is is writt written en as 'TCNWETKE'. How will 'COMPUTER' be written in the same language? A. C.

2.

THVVWRQF TGVVQOQE

B. D.

TGVWRPRF TGVWROQE

between betw een them in the t he w ord as there ther e are ar e in the English Engl ish alphabet? A. One B. Two C. Three D. More than three

7.

T h er er e is is a c er er t ai ai n r e la la t io io n sh sh i p b e tw tw e en en f ig ig u re re s (1) and (2). Establish a similar relationship between

A.

gures (3) and (4) by selecting a suitable gure from the options which will replace the (?) in gure (4).

B.

? (1)

(2)

(3)

Find Find the the missi missing ng gure gure in the given given gure gure matri matrix.

C.

?

( 4) D.

A.

B.

8. C.

3.

In whic whichh of the follow following ing gures gures,, Fig. Fig. (X) (X) is is exac exactly tly embedded as one of its part?

D.

In a row row of stud studen ents ts,, Rah Rahul ul is 12th from the left end and Shikha is 17 th from the right end. If they interchange interchange

Fig. (X)

th

their positions, Shikha becomes 27 from the right

end. How many total students are there in the row? A. 38 B. 36 C. 39 D. 41 4.

The The shee sheett of pap paper er sho shown wn in in Fig. Fig. (X) (X) is is folde foldedd to form a cube. Select the gure from the options that is similar to the cube formed by folding the given

9.

A.

B.

C.

D.

Study Study the the give givenn Ven Vennn diagr diagram am care careful fully ly and and ans answer wer the following question.

sheet. 4

17

Actors Players Doctors

25

A.

22 3

8

30

How many doctors are players but not actors? A. 3 B. 4 C. 8 D. 17

B.

10. Which Which of the the followi following ng option optionss satise satisess the same same conditions of placement of dots as in Fig. (X)?

C.

D.

5.

on the left hand side of each option, then which of the following options becomes correct?

A. C. 6.

2

Fig. (X)

If the the digit digitss '6' '6' and and '4', '4', sign signss '+' '+' and and '×' '×' are are inter intercha change ngedd

6 + 4 × 2 = 26 6 × 4 + 2 = 20

B. D.

A.

B.

C.

D.

4 + 6 × 2 = 12 4×2+6=8

How many many such such pai pairs rs of of lette letters rs are are ther theree in the word word PURPOSEFUL each of which has as many letters

| NSO | Class-7 | Set-A | Level 1

SCIENCE

11. 11. The dista distancence-time time graph graph of a motor motorcycl cyclee is shown shown in the gure. When was the motorcycle travelling at a speed of 2 m s –1?

12. 12.

A.

2.5 s

B. C. D.

5.0 s 8.0 s 10.5 s

d ( ( m)

0

6

9

12

– 114 – 210 – 40 330

A. C.

t ( ( s)

Subs Substa tanc ncee Melt Meltin ing g poi point nt ((°C °C)) Boil Boilin ing g poi point nt (°C) (°C)

80 – 196 360 1750

Column II

Plane mirror (i) Used as a magnifying glass Concave mirror (ii) Can form image of objects spread over a large area Convex Convex mirror (iii) Used by dentists to see Concave lens

(iv) The image formed is erect and of the same size as the

T. A. B. C. D.

object Convex lens (v) Is known as diverging lens P-(iv), Q-(ii), R-(i), S-(iii), T-(v) P-(ii), Q-(iii), R-(i), S-(v), T-(iv) P-(iii), Q-(ii), R-(iv), S-(v), T-(i) P-(iv), Q-(iii), R-(ii), S-(v), T-(i)

14. Read Read the given given state statement mentss and sele select ct the correct correct optio option. n. Statement 1 : The cyclone consists of a high pressure region with low pressure all around. Statement 2 : The winds tend to blow towards the

low pressure region and circulate violently around the centre of cyclone with great speed. A. B. C. D.

B. D.

1 and 2 only 1, 2 and 3 B

R

C

A

O

D

C. 17.

R

π

2

,

R

π

D.

2

p R, R, p R

A circui circuitt diagram diagram is is shown shown here. here. Which Which of the the switche switchess

must be closed so that only bulb 2 lights up ? P R

Q

1

2

S

Dry cell

3 T

enlarged image of teeth

S.

2 only 2 and 3 only

B. (i), (ii) and (iii) only D. (i), (ii), (iii) and (iv)

option. Column I

R.

Steel core

Steel core

2

13. Match Match column column I with with column column II II and selec selectt the corre correct ct P. Q.

N

of the particle from point A A to point C respectively are π R , 2 R A. B. p R, R, 2 R

the data given in the table? (i) Substance P Substance P is is in solid state at room temperature. (ii) Substance Q is in liquid state at room temperature. (iii) Substance R Substance R is gas at –150°C and solid at –220°C. is in solid state at room temperature. (iv) Substance S is

N S

S

16. A partic particle le move movess on a circu circular lar path path of radius R as shown in gure. The distance travelled and displacement

Which of the following statements are incorrect about

(i) and (ii) only (iii) and (iv) only

S

Steel core

3

3

2

N

is 30°C.

A. C.

In which which diagram(s diagram(s)) is/are is/are the the correct correct poles poles of the electromagnet indicated? (N indicates North pole and S indicates south pole.) 1

12 9 6 3

The meltin melting g and boiling boiling points points of of four differen differentt substances are shown in the table. The room temperature

P Q R S

15.

Both the statements 1 and 2 are true and and statement 2 is the correct explanation of statement s tatement 1. Both the statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. Statement 1 is true but statement 2 is false. Statement 1 is false but statement 2 is true.

NSO | Class-7 | Set-A | Level 1 |

A. C.

P , R and R and T only R, R, S and and T only

R and T only B. R and only R, S and and T D. P , Q, R,

18. When a light light ray ray is reect reected ed repeat repeatedly edly by a set set of parallel para llel plane plan e mirrors, mirr ors, the intensity inten sity of the light ligh t ray decreases after some reections. This is because of A. Poor reection from mirrors B. Absorption of some amount of light by mirrors C. Scattering of light by mirrors D.

None of these.

19. On holding holding a stainle stainless ss steel steel spoon near our face, face, we see see A. Our inverted image on outer side of the spoon B.

Our erect image on inner side of the spoon

C.

Our inverted image on inner side of the spoon

D.

Both B and C are possible.

20. F ou o u r li l i g hhtt b ul u l bs b s a re re concealed from an observer by b y a n o p a q u e w a l l a s

Opaque wall B3 B4

shown. Without shifting

the positions of the observer and the bulbs, how many bulbs can the observer obser ver see

B1

B2

Drawn to scale

from the mirror?

Plane mirror

A.

1

B.

2

C.

3

D.

4 3

21.

25. Observe Observe the the given given figure carefully carefully and select select the

Which Which of the following following statemen statements ts is/are is/are corre correct? ct?

╩

I. II.

Acids are sour in taste and corrosive in nature. Fruits Fruits and vegeta vegetable bless cont contain ain inorga inorganic nic acids. acids.

correct statements.

III. III. IV. IV. V.

All All base basess are sol solub uble le in in wate waterr. Bases Bases prod produce uce salts salts with with all metals metals.. Milk of magnesia is an aqueous solution of magnesium carbonate.

A. C.

II and IV only III and V only

reaction. II. The The colo colour ur of the the mixt mixtur uree in the conical flask is pink in the beginning. III. III. It rep repre rese sent ntss a neut neutra rali li-sation reaction.

B. D.

I.

I only I, II, III, IV and V

22. Study Study the the given given ow chart chart caref carefully ully.. Changes iii ii i a. Fore Forest st a. Low and high high a. Sublima Sublimation tion a. res tides of camphor b. Earth- b. Openin g of a b. Bl ow in g of b. morning glory balloon quakes

HCl

Heat is evolved in this

Burette NaOH + Phenolphthalein

IV. IV.

No new new substa substance nce is is formed formed in in the reac reactio tion. n.

A. C.

I, II and III only III and IV only

B. D.

II and III only I, II, III and IV

26. 26. Somya Somya took took water water in ve ve diffe different rent tumblers tumblers (I-V) (I-V)

iv

and added different substances to each tumbler. She stirred the contents with spoon and then recorded her

Burst Bursting ing of crackers Breaki Breaking ng of glass

observations in the given table.

ower

Changes i, ii, iii and iv could be respectively A. Fast, non-periodic, reversible and chemical B. Undesirable, periodic, reversible and fast C. Fast, chemical, irreversible and non-periodic D. Undesirable, reversible, chemical and irreversible. 23. A few few chan changes ges are listed listed in the the box box : (i) Cutting of hair (ii) Mixing fruits and cornakes (iii) Adding baking soda to vinegar (iv) Spoiling of food (v) Bending of a piece of metal on heating (vi) Decomposition of old leaves (vii) Shredding

S. Substance No. added I. Sand

Observation

Inference

Disappear in water

Soluble

II.

Soap po powder

Disappear in in wa water

Insoluble

III. II.

Talcu lcum po powder Does not dis disaappear ear

Ins Insolubl lublee

IV.

Sawdust

Disappear in water

Soluble

V.

Grou Ground nded ed wax wax

Does Does not not disa disapp ppea earr

Inso Insolu lubl blee

The correct observations and inferences are A. I, II and IV only B. III and V only C. IV and V only D. None of these. 27. Study Study the the given given gure gure care careful fully ly..

of paper Which of the following represents their correct

classication? Physical (Irreversible)

Physical Chemical (Reversible) (Irreversible)

(i), (vii) (ii), (v)

(ii), (v) (iii), (iv), (vi) B. (i), (vii) (iii), (iv), (vi) C. (ii), (iii) (i), (iv) (v), (vi), (vii) D. (i), (vi) (v), (vii) (ii), (iii), (iv) 24. Identify W , X , Y and Z in in the given ow chart. A.

and husk

Sugar in water

Separation technique

W

4

Sand in water


Which of the following reactions explains the above change most appropriately? A. ZnSO4 + Cu → CuSO4 + Zn B. CuSO4 + Fe → FeSO4 + Cu C. FeSO4 + Cu → CuSO4 + Fe D. CuSO4 + Zn → ZnSO4 + Cu

X

28. Match Match column column I with with column column II II and selec selectt the corre correct ct option from the given codes.

Oil in water


Y

Column I


P. Used as a preservative Q. Used Used in in medi medicin cines es as well well

Z

W

X

Y

A.

Winnowing

Filtration

B.

Sedimentation

Winnowing

C.

Sieving

Evaporation Filtration

D.

Hand Handpi pick ckin ing g SedimenSedimentation

Sedimentation Filtration

Winnowing

Brown-red deposition

X nails

Mixtures Wheat four

Green coloured solution

Blue coloured solution

Z

Evaporation S e pa pa r at at i ng ng funnel S e pa pa r at at i ng ng funnel

Evaporation

as in re extinguishers

Column II (i) KNO3 (ii) CuSO4.5H2O

R. Used Used as as a fungic fungicide ide and in (iii) NaCl electroplating S. Used in reworks (iv) NaHCO3

A. B. C. D.

P – (iii), Q – (iv), R – (i), S – (ii) P – (ii), Q – (iii), R – (i), S – (iv) P – (i), Q – (iv), R – (iii), S – (ii) P – (iii), Q – (iv), R – (ii), S – (i) | NSO | Class-7 | Set-A | Level 1

29. Refer Refer to the the given given ow ow chart chart and and select select the optio optionn R and S . that correctly identies organisms P , Q, R The organism shows heterotrophic No mode of nutrition.

P

Yes The organism shows parasitic Yes mode of nutrition.

Q

33. Read Read the given given parag paragrap raph. h. Pollination processes P , Q or R R are requisite for accomplishment of sexual reproduction in plants. P does not require any external agent but Q and R do. P and and Q help in producing purelines whereas R gives

rise to offspring showing variations among themselves. R and select the correct Identify processes P , Q and R

No

The organism shows saprophytic Yes mode of nutrition. No

option regarding these. A. Process P Process P is is possible in both unisexual and bisexual

R

B.

S

A. B. C. D.

P Hydrilla Hibiscus Elodea Ocimum

Q Hydra Taenia Cuscuta Coleus

R S Dionaea Amoeba Bladderwort Bladderwort Croton Rhizopus Rhizopu s Gambusia Mistletoe Mistletoe Spirogyra

and Y in in separate test 30. Aryan Aryan took took two two food food samp samples les X and tubes. He added 2-3 drops of Benedict’s solution in food sample X and and heated it while he added two drops of copper sulphate solution and few drops of caustic soda solution in food sample Y . He observed that sample X turned orange while sample Y turned turned violet. Which of the following is correct regarding X and and Y ? A. X could could be egg while Y could could be boiled potato. B. X could could be ripened banana while Y could could be milk. C. X could could be wheat while Y could could be butter. D. X could could be milk while Y could could be rice.

D.

owers with nectar and odour to attract bats for completion of process Q.

34. Refer Refer to the the given given ow ow chart chart and and select select the the incorr incorrect ect option regarding organisms P , Q, R, R, S and T . P Endoskeleton is present. R

T

No

No

sh, Leech, Crocodile - Frog, Toad, Bony sh, Turtle, Man, Land Snail - Cockroach, Pigeon, Tortoise, Lizard, Snake

(iii) Uricotelism

A. C.

(i) and (ii) only (iii) only

B. D.

(ii) and (iii) only (i), (ii) and (iii)

32. Refer Refer to the given given Venn diagra diagram m and selec selectt the incorrect option regarding P , Q and R. Obtained Obtained Natural from a P bre Q from a mammal plant R

Obtained from an insect

A.

C.

D.

Yes

No

Body is streamlined.

Liquid skeleton is present. Yes

Yes Hollow bones are present.

Q

A.

P may

B.

S could could be a warm blooded stork whereas T could could be a cold blooded arowana. R may bear jointed appendages and undergoes moulting during its growth phase. T may may respire through gills whereas S possesses

C. D.

animal only once in its lifetime. and R may involve retting, Processing of bres P , Q and R shearing and reeling steps, respectively.

have a pair of tentacles which bear simple eyes at the tip whereas body of Q may be metamerically segmented.

lungs as its respiratory organs. 35. Refer Refer to the the given given food food chai chainn operati operating ng in an an ecosy ecosystem. Producer

P

Q

R

A population of organism X is introduced in this community which exclusively feeds on Q. Which of

the following graphs correctly shows the changes in populati popu lations ons of P and R over time? Key :

P

A.

P could could be sisal, Q could be wool and R could R could be cotton. Q could be obtained from the same animal R could be obtained from an repeatedly whereas R could


Yes Muscular foot is present.

Yes

P is and R are are protein is a cellulosic bre whereas Q and R

bres. B.

No

S

Ammonotelism - Sponges, Hydra Sponges, Hydra,, Cartilaginous

(ii) Ureotelism

accomplished through processes P and and Q both. In case of Maple and Dandelion , wind serves as an agent for completion of process R. R. Sunower and Raf esi a produce bright showy

C.

31. Select Select the incorr incorrec ectt matc match. h. (i)

owers. Sexual reproduction in papaya and cucurbit is

n o i t a l u p o P

R

P R

B.

n o i t a l u p o P

R P

Time

C.

n o i t a l u p o P

P

Time

R

D.

n o i t a l u p o P

R

P

Time

Time

5

36. The The give givenn gra graph ph shows shows the effect of pH on the activity P , of four different enzymes ( P Q, R R and S ). ). Which of the

following correctly identies enzyme found in the stomach, small intestine and one not

A. Q

S

B. C.

y t i v i t P c A

0

affected by pH? A. B. C. D.

R

which escapes harsh winters by migrating to

1 2

3 4 5 6 7 8 9 10 1 0 11 pH

Stomach Stoma ch R S P Q

Small intestine intest ine S P R S

P has has thick layer layer of subcutaneous fat for effective insulation against cold. P is is cold blooded whereas Q is warm blooded. P is is penguin which is adapted to live in extremely cold regions whereas Q could be Siberian crane

Unaffected by pH Q R Q P

37. Manya Manya wante wantedd to nd nd out ifif plants plants abso absorb rb water water throu through gh

D.

warmer lands. Both P and Q may have webbed feet but P is adapted to swimming whereas Q may swim and

y both. 40. If a person person is unable unable to breathe breathe on on his own due due to some medical illness, an iron lung may be employed to take over the role of the diaphragm and the intercostal muscles. The person is placed in a cylindrical chamber

their roots, so she decided to conduct an experiment.

called iron lung while his head remains outside the

Which of the following two set-ups should she choose to conduct a fair test?

Changes in the air pressure within the iron lung allow

cylinder. An airtight seal is placed around his neck. the ow of air into and out of his lungs. Which of the following statements about the iron lung is correct? A. Breathing with an iron lung is still possible if the

patient's trachea is completely blocked. B. C.

D.

During exhalation, the iron lung causes the patient's lungs to expand. During inhalation, the pressure in the patient's lungs is increased.

Inhalation and exhalation is possible even if the patient's lung is punctured.

41. 41. Which Which of the the followi following ng is the the most most effect effective ive way way to measure the effect of different carbon dioxide

concentrations on the rate of photosynthesis? A. Placing same amount of dry ice in similar bell jars kept in sunlight containing different plants. A. C.

P and and Q Q and R and R

B. D.

Q and S None of these

38. To prepare prepare a blood blood smea smearr slide slide a student student plac placed ed a drop of blood on a glass slide and added a drop of distilled water to dilute the blood. He then added stain (a coloured chemical used to see the cells) to

B.

Using different concentrations of sodium hydrogen carbonate solution with same type of immersed water plants in similar bell jars placed in sunlight. C. Varying light intensity given to different well watered plants placed placed in similar bell jars kept in sunlight. sunlight. D. Varying amount of air provided to different well watered plants placed in similar bell jars kept in

it before placing the coverslip over it. When viewed, under the microscope he could not see the blood cells. Which of the following best explains this? A. The blood cells had burst. B. The blood had dried before the water was added. C. The drop of water diluted the blood too much and

cells dispersed too far away from each other. D.

The water caused the cells to shrink.

39. Refer Refer to the given given Venn Venn diagra diagram m and select select the the incorrec incorrectt

sunlight.

42. Saurasht Saurashtra, ra, a land land with with history history of sever severee water water scarcity scarcity,, hostile climate and rocky land is now self sufcient in water availability due to the efforts of _____ who taught the local people the importance of rainwater

harvesting. A. Rajendra Singh

B.

Shamjibhai J.Antala

C.

D.

Aabid Surti

43. Refer Refer to to the give givenn dicho dichotom tomous ous key key..

option regarding P and Q.

I. Wings shaped

like ippers

P

Streamlined

body

Amla Ruia

Q

Pneumatic bones

(a) Food is obtained from plants. - Go to II (b) Food is obtained obtained from animals. animals. - Go to III

II. (a) Food is obtain obtained ed from from roots roots of of plants. plants. – P (b) Food is obtained from seeds of plants. – Q

6


III. (a) Food is categorised categorised as energy giving giving food. –

A.

R

(b) Food is categorised categorised as body building building food. – S Now select sele ct the correct corr ect option opti on regardin rega rding g food P , Q, R and S. A. P could could be fenugreek whereas Q could be corn or maize. B. R could be egg whereas S could could be honey. C. R could be obtained from a ying insect whereas S could be obtained from both oviparous and viviparous animals. D. P could be turmeric or ginger whereas Q could be rice or lentils. 44. Rahul Rahul took took equal equal amou amount nt of thre threee types types of soil soil X , Y and Z in different vessels, each with pores at the bottom. bott om. He then poured pour ed equal amoun t of water over each sample one by one and tabulated the percolation rate of these three samples as rep resented by the given graph.

B.

C. D.

Soil Y shows shows highest water Y e t retention and is best suited a Z r ) n n i for making the bottom of o m i t / X an articial pond. a l L o m c Soil Y is is present in marshes r ( e whereas soil Z is is abundantly P Soil samples found at sea shores. Soil Y is is well drained whereas soil X is is not, hence is often water logged. Soil X is well aerated hence ideal for growth of plant roots whereas plants growing in soil Z possess posses s aerial roots or pneumatophores pneumatop hores as it is water logged.

45. Study Study the the give given n relat relation ionshi ship. p. Fruit peel :: Used syringe :: Plastic tifn Select the option that satises the same relationship. A. Chapati :: Used urine bag :: Glass bottles B. Newspaper :: Blood sample :: Cooked beans C. Spectacles :: Rotten vegetable :: Mirror D. Metal keys :: Newspaper :: Animal excreta

Select the correct option regarding this.

ACHIEVERS SECTION

46.

Refer Refer to the the given given graph graph and identify identify habitats habitats P , Q, R and S .

X W

r r

r

Y Z

) C 50 ( e r u t 25 a r e p m e 0 T

S

°

P

Q

–25

A. C.

Habitat R

48.

Now, select the option that correctly matches the habitat with the type of adaptation shown by organisms inhabiting them. P

Q

R

colouration

C. Mimicry

D. Pneumato phores

47.

concentrated extensive urine lamina Thick fur Subcutaneous fat

S

Leaves Aestiv stivaatio tion modied into spines Stem stores Startling water and colouration mucilage

Leaves modied into spines Roo Roots reduced or absent Blubber

In the the arrange arrangement mentss I and and II shown shown in gure, gure, four pins W , X , Y and and Z are are xed to a metal loop and metal rod with the help of wax. Loop and rod are made of same material and equal thickness. Which set of pins will fall simultaneously? ( r is is the radius of the loop.)


Y and and Z only W and and X only

1. 2. 3. 4. 5.

B. D.

W , X and and Y only only W , X , Y and and Z

A few few solutio solutions ns were were tested tested with with differe different nt indicat indicators ors and results were noted down in the given table. S. Solut ion No.

A. Camouage Excretion of Leaves with Thick fur

B. Startling

II

I

V W X Y Z

Colour wi w ith China rose indicator Dark pink Dark pink Light pink Green Light pink

Colour with methyl orange indicator Red Red Orange Yellow Orange

Study the given table carefully and ll in the blanks by choos ing an appro priate pria te option. opti on. Solution(s) (i) will have no effect on blue litmus pap er whi le sol uti on( s) (ii) will turn blue litmus red. Phenolphthalein remains colourless in solution(s) (iii) while it changes to pink colour in solution(s) (iv) . A. B. C. D.

(i)

(ii)

(ii i)

(iv)

X ,Y

V

W , Z Z

Z

X , Y , Z

V , W

V , W , X , Z

Y

V , W , X , Z

V , W

Y

X , Y , Z

X ,Y , Z

V , W

V , W

Y, Z

7

Direction (Q. No. 49 and 50): Read the given passage having some variables and few italicised words. Different respiratory organs are present in different organisms. X is the main respiratory organ in humans. Respiratory system of cockroach consists of small openings on the tracheoles which are connected sides of its body called tracheoles to the tubes called tracheae that tracheae that are further branched into spira sp ira cle s. Scoliodon respires through Y which is richly is the main site of gaseous supplied with blood vessels. Z is exchange in plants. Each Z Each Z is is guarded by two kidney shaped sub sidiar sid iar y cells which are further anked by specialised epidermal cells called gua rd cells. cells.

49. Identify X , Y and Z in the given passage and select the incorrect option regarding them.

A.

B. C.

Y is the respiratory organ in tadpole larva and sea horse. Z is is absent in all hydrophytes but is abundantly

present on the upper leaf surface of all xerophytes. D.

When pressur e inside X drops, inspiration occurs and when pressure inside X starts increasing the air contained in it is pushed out causing expiration.

50. Select Select the correct correct option option regardin regardingg the words italicised italicised in the given passage. A. B.

Whales and dolphins also have X as as their respiratory organ where alveoli is the main site of gaseous

C.

exchange.

D.

The positions of spiracles of spiracles and and tracheoles should tracheoles should be interchanged. The position of tracheoles tracheoles and tracheae tracheae should be interchanged. Subsidiary should not be replaced as it is correctly mentioned. Guard should should be replaced by lenticel.


8


Class 7

Set B Year 2017

LOGICAL REASONING

1.

Select Select a gure gure from the options options which which will will conti continue nue the same series as established by the Problem Figures. Problem Figures

2.

A.

B.

C.

D.

7.

Arrange Arrange the given given words words in in a meaning meaningful ful sequence sequence and select the correct option. 1.

Probation

2.

Interview

3.

Advertisement

4.

Selection

3.

4.

3, 5, 2, 1, 4

B.

3, 5, 2, 4, 1

C.

3, 5, 4, 2, 1

D.

3, 2, 5, 4, 1

8.

Count the number of triangles in the given gure. A.

36

B.

38

C.

34

D.

None of these

If P is brothe brotherr of Q, Q is sister sister of S and S is father father

9.

of R, then how is R related to P?

5.

A.

Brother

B.

C.

Son

D.

Cannot be determined

Nephew

153

C.

182

D.

142

Group the given gures into three classes on the basis of their identical properties using each gure only once.

1, 3, 1, 1,

6, 1, 6, 4,

9; 6; 9; 9;

3, 4, 3, 3,

4, 5, 5, 5,

7; 7; 8; 7;

2, 2, 2, 2,

5, 8, 4, 6,

8 9 7 8

Riya walks 15 m towards West. She turned left and walks 20 m. She then turned left and walked 15 m. After this she turned to her right and walks 12 m. How far and in which direction is she now from the starting point? A.

32 m, South

B.

47 m, East

C.

42 m, North

D.

42 m, South

The given question consists of a set of three gures X, Y and Z showing a sequence of folding of a piece of paper. Fig. F ig. ( Z) shows s hows the manner m anner in which wh ich the t he folded fo lded paper has been cut. Select Selec t a gure gur e from the options opti ons which would most closely resemble the unfolded form of Fig. (Z).

X

M P S

SPM ?

A.

C.

?

B.

?

D.

?

M P S

2

B.

Select Select the correct correct water water image image of Fig. (X). ? SPM Fig. (X)

6.

173

A. B. C. D.

5. Applic Applicati ation on A.

A.

Y

Z

A.

B.

C.

D.

M P S

72

?

225

If the rst and third digits digits in each each of the following following numbers are interchanged and then the numbers are arranged in descending order. What will be the middle digit of the middle number?

4

3

1

613 432 573 485 907

2

1

2

A.

8

B.

1

0

5

6

C.

3

D.

7

Find the missing number, number, if a certain rule is followed either row-wise or column-wise.

10.

| NSO | Class-7 | Set-B | Level 1

SCIENCE

11.

12.

13.

14.

The given given diagram diagram shows ve ve bulbs bulbs connected connected to two dry cells. When one of the bulbs is faulty, the other four bulbs remain lighted. Which bulb is faulty? A. 1 only B. 3 only C. 2 or 4 only D. 2 or 4 or 5 only Which of of the following statements are correct? correct? (i) Increased wind speed results in reduced air pressure. (ii) Wind current occurs due to the uneven heating of the earth by the sun. (iii) In thunderstorm it is safe to lie on the ground. (iv) High pressure prevailing prevailing at the centre centre of the cyclone is called the eye. A. (i) (i) and and (ii) (ii) only only B. (ii) (ii) and and (iii (iii)) only only C. (i) and (iv) (iv) only only D. (ii (ii),(iii (iii)) and (iv (iv) only nly Which of the following following statements statements are are correct correct about about pots? pots ? (i) Black pots are used for cooking because they increase the rate of cooking. (ii) Silver pots are used for keeping food warm because they decrease the rate of heat dissipation. (iii) Pots are are made of clay clay to increase the rate rate of cooking. cooking . A. (i) (i) and and (ii) (ii) only only B. (i) (i) and and (iii (iii)) only only C. (ii) (ii) and and (iii (iii)) only only D. (i), (i), (ii) (ii) and and (iii (iii)) Anu shone shone a torchlig torchlight ht at a bunch of grapes as shown here. What can Anu do to enlarge the Torchlight shadow of the bunch of grapes on the screen? (i) (ii) (iii) (iv) A. C.

15.

120° A

P and and S are are the north poles. Q will repel T . S and and U will will attract each other. R and R and T are are like poles.

17. 17.

C

B

A current-carr current-carrying ying wire is coiled around an iron horseshoe as shown in the figure. What are the polariti pola rities es at X and Y ? At X At Y A. North pole North pole B. Sout South h pole pole Sout South h pole pole C. North pole South pole D. Sout South h pole pole North North pole pole

X

Y

18. A train leaves leaves a station station X at 5:00 pm and reaches another station Y at at midnight. Its speed is 90 km h –1. What is the distance between stations X and Y ? A. C. 19.

480 km 800 km

B. D.

630 km 830 km

Read the given given stateme statements nts and and select select the correct correct option.

Statement 2 : Pressure reduces when air moves with high speed.

Screen

N

R S

A.

B.

C. D. 20.

Both statement 1 and statement 2 are true and statement 2 is the correct explanation of statement 1. Both statement 1 and statement 2 are true but statement 2 is not the correct explanation of statement 1. Statement 1 is true but statement 2 is false. Statement 1 is false but statement 2 is true.

A ray of light travels travels from air to water as as shown in in gure. What are ray AB and AB and ray AC ?

P Q T U

Figure Figure shows shows a ray of light light P striking a mirror AB . The mirror AB and AB and the mirror CD CD makes an angle of 120° with each other.

NSO | Class-7 | Set-B | Level 1 |

20°

What is the angle of reection at mirror CD? CD ? A. 50° B. 40° C. 30° D. 90°

Shift the grapes nearer to the torchlight. Shift the screen away from the grapes. Shift the screen closer to the grapes. Shift the torchlight further away from the grapes. (i) and (iii) only B. (i) and (ii) only (iii) and (iv) only D. (ii) and (iv) only

Which of the following statements about the iron nails is correct?

16.

P

Statement 1 : If you hold a paper stri p of 20 cm width betwe en the forenger fore nger and thumb thum b and blow air over its top, then the far end of the paper strip begins to lift upwards.

Raju used a magnet magnet to attract attract an iron nail. Then he observed that more nails could be attracted in a manner as shown here. N represents north pole of magnet.

A. B. C. D.

D

A. B. C. D.

Ray AB Reected ray Reected ray Refracted ray Refracted ray

Ray AC Refracted ray Reected ray Reected ray Refracted ray 3

21.

Shruti tested tested the the nature nature of a few common substances with the help of some indicators. Indicators used and changes she observed are as follows :

Which of the following represents the properties best bes t sui table tab le to dis tingui tin guish sh betwee bet ween n the sub sta nces of each pair? I A. Cond Conduc ucti tivi vity ty B.

Trans Transpa paren rency cy

C.

Britt rittle len ness D. Transpa Transparenc rency y

Substances present in test tubes I, II, III and IV are respectively A. Salt solution, curd, lemon juice and vinegar Orange juice, window cleaner, sugar solution and B. lime water Vinegar, Vinegar, soda water, soap solution and lemon juice C. D. Lemon juice, lime water, window cleaner and soap solution. 22.

25.

P. Q. R.

S.

A. B. C. D.

Winn Winnow owin ing g Handpi Handpicki cking ng Sieving Sieving

Centrifug Centrifugatio ation n

X

A. CuSO 4.5H 2O Physical change B. MgSO4.7H2O Physical change C. FeSO4.7H2O Chemical change D. CuSO4.5H2O Chemical change

24.

4

Y

Z

CuSO4

H2O vapours H2O vapours H2O droplets H2O droplets

MgSO4 FeSO4 CuSO4

Consider the following pairs of substances substances : I : Glass plate and steel plate II : Iron nail and wooden rod III : Glass marble and ower petals IV : Chalk powder and sugar

Ms Rakhi, a science science teacher teacher listed listed some keywords keywords on the blackboard as :

A. B. C. D.

23. Observe the given change carefully and identify W , X , Y and Z .

W

Magne Magnetic tic Relative nature density Colou olourr Miscibility Conduct Conductivity ivity Elas Elasti tici city ty

IV Phy Physica ical state Solubility in water Taste ste Solubilit Solubility y in water

She asked students to match the keywords with the common changes which are listed as : P : When we put a lid on a vessel containing hot milk, the inside of the lid gets wet. Q : When we breathe onto a cold mirror it turns foggy. fogg y. R : When we spread hard butter on a warm toast, it becomes beco mes soft . S : Solid piece of an air freshener kept on the bathroom bath room shelf shel f disappear disa ppear s in a few days. days . T : When we put ice cubes in water, they disappear after some time. U : Milk left in the freezer becomes ice cream. The correct match is

Column II

D i f f e r e n c e i n s i z e o f (i) (i) components of a mixture Difference Difference in the weight weight of (ii) components of a mixture Difference Difference in size, shape (iii) and colour of components of a mixture If solid particles in a (iv) liquid are very small and can pass through a lter paper P - (i), Q - (ii), R - (iv), S - (iii) P - (iv), Q - (iii), R - (ii), S - (i) P - (ii), Q - (iv), R - (i), S - (iii) P - (iii), Q - (i), R - (ii), S - (iv)

III Sha Shape

(i) Freezing (ii) Evaporation (iii) Melting (iv) (iv) Sublimation (v) Condensation (vi) Vaporisation Vaporisation

Match column column I with column column II and select select the correct option from the given codes. Column I

II Ela Elastici ticitty

P - (ii); Q - (vi); R, S - (iii); T, T, U - (i) P, Q - (ii); R - (iii); S - (iv); T, U - (i) P, Q - (v); R, T - (iii); S - (iv); U - (i) P - (i); Q, R - (v) ; S, T - (iii); U - (iv)

Beaker 26. Observe Observe the the given figure carefully and choose the Conc. H2SO4 incorrect statement(s). I. Large volume of acid Glass rod should be added to a small volume of water slowly. Water II. The gure represents represents the process process of of concentrati concentrating ng dilute H2SO4. III. The process process involves involves release release of a large large amount amount of heat. IV. Water should not be stirred. stirred. A. I and IV only B. II and III only C. I, II and IV only D. II only

27.

Ria, a class 7 student classified a few few changes as shown in the table : S. No. I. II. III. IV. V.

Periodic ch change Occur Occurren rence ce of new new moon moon Growth of plants Occurrence of a rainbow Sunr Sunris isee and and suns sunset et Openin Opening g of Morning Morning glory ower

Non-periodic change Volcanic olcanic eruption eruption Heartb rtbeat Low and high tides tides Fall Fallin ing g of tree treess Earthquake


The changes classied correctly are A. I, IV and V only B. I, II and IV only C. I and V only D. I, II, III, IV and V 28.

A. B. C. D.

30.

Refer to the given given Venn Venn diagram diagram and select select the correct option regarding X and Y .

1 Melting of ice Burning of paper Breaking of a glass Tearing Tearing of paper

•

1

3

•

2

Chemical change

X

A.

Irreversible change 2 3 Boiling Burning of rice of a candle Rusting Cutting of of iron fruits Baking Burning of a cake LPG in kitchen Evaporation Making of water lemonade

Radhika classied plants plants into three groups groups of three members each. By mistake, she placed one incorrect member in each group. Identify this odd member and select the correct option. Group I : Nepenth Nepe nthes, es, Raf esia, es ia, Dro sera ser a Group II : Cuscuta, Hydnora, Utricularia Group III : Hibiscu Hibi scu s, Petu nia , Dionae Dio naea a Drosera in group I should be interchanged with A. Drosera Hydnora in Hydnora in group II. Utricularia Utricularia in group II should be interchanged B. with Petunia with Petunia in in group III. Rafesia in group I should be interchanged with C. Rafesia in Hibiscus in Hibiscus in group III. Utricularia in group II should be interchanged with D. Utricularia in Rafesia Rafesi a in group I whereas Dionaea whereas Dionaea in in group III should be replaced with Ocimum .

B. C. D. 32.

B. C. D. 33.

A. B. C.

D.


Refer to the given given dichotomous dichotomous key and select select the correct option regarding P, Q, R and S .

III.

A. B.

C. D.

(Atmospheric air)

High level of oxygen in the air causes breathing rate to drop, regardless of carbon dioxide level. Increase in carbon dioxide level in air causes breathing rate to increase upto a limit. Breathing rate is controlled only by oxygen content of air and is independent of carbon dioxide concentration. None of these

Labelled parts P and U are are the torrid zones. Labelled parts Q and T are are temperate zones. Labelled parts R and R and S are are frigid zones. None of these

(a) It is a vitamin deciency disease. – Go to II (b) It is a mineral deciency deciency disease. – Go to III II. (a) It is is characte characterised rised by bleeding bleeding gums and aching aching joints. – P

21% O2 + 0.03% CO 2

Time What conclusion may be derived from the graph?

Mint Maize Mustard Bamboo

I.

91% O2 + 9% CO 2

100% O2

Aloe Aloe Coriander Basil Palm

Y

Refer to the given figure showing different temperature zones of the Earth and select the correct statement. A.

The given given graph shows how the rate of breathing breathing of a person changes under different conditions. At the beginnin begi nning g of each exper iment, imen t, the pers on is breathin brea thing g in atmospheric air.

Breaths per minute

Leaves have It is Y parall el a herb. venation.

Leaves have X reticulate venation.

Study the given Venn Venn diagram and identify points 1, 2 and 3. Physical change

29.

31.

34. 34.

(b) It is characterised by red rashes, scaly lesions on skin, diarrhoea, dementia, etc. – Q (a) It affects haemoglobin formation in blood. – R (b) It affects many many metabolic processes of the body and is often characterised by prominent swelling in neck region. – S P is is caused by vitamin C deciency whereas Q is caused by vitamin E deciency. P is is scurvy, Q is pellagra, R is R is anaemia and S is S is goitre. Person suffering from R should R should take iodised salt and more of citrus fruits. Diseases P Diseases P and and Q occur in children only whereas diseases R diseases R and and S occur occur only in adults.

Refer to the the given pie diagram representing composition composition of soil. Select the correct option regarding constituents X and Y . is formed by weathering of parent rock. A. X is Y contains contains nutrients required by the plants for their B. proper growth. is composed of gravel, sand, silt or clay. C. X is D.

All of these 5

35.

Small Small populatio population n of three three organisms P , Q and R were reared in captivity for sometime. The given graph shows changes in their populations over time. Study the graph and select the correct statements regarding organisms P , Q and R. (i) (ii) (iii)

(iv) (v) A. C. 36.

Q could be a heterotroph whereas P and R and R could could be autotrophs. Q is a herbivore that feeds exclusively on P . If population of R of R is is removed from this community, communit y, then population of P will decrease whereas that of Q will increase. P is is a carnivore, Q is a herbivore whereas R whereas R is is an omnivore that feeds on both P and and Q. R is R is the predator of P of P which which in turn is the predator of Q. (ii) and (v) only B. (i), (iii) (iii) and (iv) only (i) and (ii) (ii ) only onl y D. (iii), (iii), (iv) and (v) only

38. 38.

B. C.

D.

37. Refer to the the given given ow ow Animal possesses Yes P chart and select select the incorrect incorre ct endoskeleton option regarding P, Q, R No and S . Possesses chitinous Yes Q may have mammary A. P may exoskeleton glands and may respire No through lungs whereas Has exoskeleton Yes R Q may have jointed of shell appendages and No may respire through S tracheae. Q could be a sh with 2 chambered heart or a B. reptile with 3 chambered heart. C. D.

6

R may have unsegmented body with distinct head, muscular foot and visceral hump. S could could be a detritivore which respires through its moist skin and is often called as farmer's friend.

/ et m a w

m( o e

Branches t

f n et m e a R

v o m

Trunk 06.00 08.00 10.00 12.00 14.00 16.00 18.00 20.00 22.00

Time of day

Which of the following can be inferred from the graph? A. More water passes through the trunk than the branches. B. The greatest increase in the rate of water movement rst occurs in branches. C. The increase in the rate of water movement rst begins in the trunk. D. 39.

X Y Identify them and select the incorrect option regarding them. X always carries oxygen rich blood away from the heart whereas Y always always carries carbon dioxide rich blood towards the heart. Y is provided with valves to prevent the back ow of blood whereas valves are absent in X . X is is usually deep seated whereas Y is is supercially placed. Pressure of blood is much higher in X in X as as compared to Y.

)s r

The given given gure shows the cross sections of two blood vessels X X a n d Y Y f o u n d i n humans.

A.

The given given graph shows shows rate of of water movement movement through trunk and branches of a tree during a day.

40.

None of these

Which of the the following following is not not an adaptation? adaptation? A.

Some aquatic animals possess gills for breathing and have streamlined bodies.

B.

Forelimbs of birds are modied into wings and they have hollow air lled bones.

C.

People living in plains suffer from altitude sickness when they visit mountainous regions but soon recover and adjust to the changes.

D.

Animals inhabiting polar regions have thick furs and thick layers of subcutaneous fat.

Mr Khanna had a pond in his garden, lled with all kinds of aquatic plants. He wanted to prevent mosquitoes from breeding in the pond without harming the plants in any way. He could __________. (i) Add salt into the water (ii) Add some goldsh into the pond (iii) Spray a lm of oil on the surface of the pond A.

(i) only

B.

(ii) only

C.

(iii) only

D.

(i), (ii) and (iii)

41. The given graph shows changes in pH of water in an undisturbed freshwater lake on a summer day.

7.5

H 7 p 6.5

What is the probable cause of the rise in pH of water between betw een time period peri od X and Y ?

6

X

Y

Time

A.

Decreased level of mineral nutrients in water.

B.

Decreased level of carbon dioxide in water due to photosynthesis performed by water plants.

C.

Increased level of carbon dioxide in water due to respiration performed by water plants and animals.

D.

None of these | NSO | Class-7 | Set-B | Level 1

42. 42.

Refer to the given pie chart chart representing the composition of air.

44.

Which of the following is the incorrect statement statement regarding it? is an important component of fertilisers and A. X is proteins present in our body. is necessary for humans to get energy from food. Y is B. C. During the process of burning X is used up and Z is is given out. D. Both B and C 43. 43.

Refer to the given diagram diagram of human digestive system and select the correct option regarding its labelled parts P, Q, R, S and T . R secretes digestive enzymes A. R secretes viz. amylase, viz. amylase, lipase, pepsin, trypsin, etc. secretes bile juice whereas B. P secretes T secretes secretes hydrochloric acid. S is is longer in herbivores as compared to carnivores C. to aid the digestion of cellulose rich food. D. Q is the largest digestive gland which secretes different enzymes for digestion of fats, proteins and carbohydrates.

Complete the given given paragraph paragraph by selecting selecting the correct correct option. Jute is a rainy season crop and grows best in (i) climate. It grows well in (ii) soil receiving silt from annual oods, as in the Sunderban delta in (iii) and (iv) . A.

(i)-Warm and humid, (ii)-Alluv ial, (iii)-India, (iv)-Bangladesh

B.

(i)-Cold and dry, (ii)-Black, (iii)-India, (iv)-Bangladesh

C.

(i)-Warm and humid, (ii)-Sandy, (iii)-India, (iv)-Nepal

D.

(i)-Cold and dry, (ii)-Alluvial, (iii)-Bangladesh, (iv)-Nepal

45.

Read the following following statements statements and select the incorrect incorrect one. A.

Platelets are smaller in size than both RBCs and WBCs.

B.

Platelet count decreases during certain infections.

C.

Platelets prevent blood loss in case of any injury.

D.

None of these

ACHIEVERS SECTION

46.

Which of the following cannot be speed-time speed-time ( v – t )

(i)

graph(s)?

inegar ar A. Vineg

(i)

(ii)

(iii)

47.

(v)

A.

(ii) and (iv) only

B.

(iii) and (v) only

C.

(iv) only

D.

(i) only

Fill in the blanks blanks in the given given table by choosing choosing an appropriate option.

Red

(iii)

Spinach juice Yellow Salt B. Sugar solution solution Green n Tomat omato o C. Common Gree salt juice Green Salt D. Lime juice solution 48.

(iv)

(ii)

(iv)

(v)

Yello ellow w

Sugar Sugar solution Pink Lime water Mage Magent ntaa Caustic soda Yello ellow w Aerate Aerated d drink

Refer to to the given paragraph paragraph where few few words have been italicis ital icis ed. Wool is obtained from fleece of certain animals. Angora wool is obtained from Angora goat Angora goat . It is much warmer and soft er than than other wools. Mohair wool is obtained from Angora rabbit . Cashmere is obtained from yak from yak and and is common in Kash in Kashmir mir . Llama Llam a, Alpaca and Vicuna are Vicuna are members of camel family that yield extremely ne and expensive wool.

( iii )

Red

Colourless

( iv )

Select the correct option regarding this. A. Softer should be replaced with harder whereas Vicuna should Vicuna should be replaced with Lohi. B. The positions of go at at and rabbit should be interchanged. Yak Ya k should not be replaced as it is correctly C. mentioned whereas Kashmir should be replaced with Kota with Kota.

(v)

Yellow

Pink

Green

D.

Indicators Solution

Methyl

Phenolphthal halein

orange

(i)

Orange

Lime water Yellow


China China rose

Colourless

Pink

Pink

( ii )

Camel should should be replaced with sh with shee eep p whereas Llama whereas Llama should not be replaced as it is correctly mentioned. 7

49.

Refer to the given given dichotomous dichotomous key key and select select the correct option regarding P, Q, R and S . I.

(a) (b)

II. (a) (b)

Plant shows natural vegetative propagation. – Go to II Plant reproduces through asexual spores. – Go to III Plant propagates propagates through through stem. – P Plant propagates through leaves. – Q

III. (a)

Leaves of plants called fronds contain contain spores. spores. – R

(b)

Short plants that grow only in moist moist habitats habitats and bear spores in spore case or capsule. – S

A.

P could could be Chrysanthemum or Chrysanthemum or strawberry whereas R could R could be mushroom or mould.

B.

Q could be Br yop hyl lum lu m or Beg oni a whereas S could could be fern or moss.

C.

P and and Q may produce owers and seeds whereas both these structures are absent in R and R and S.

D.

P could be garlic that propagates through bulbs or turmeric that propagates through tuber whereas Q could be Petunia or Petunia or Begonia.

50.

Refer Refer to the given given Sparrowhawks Snakes food web operating in a community. Sparrows Caterpillars Large amount of Mice Flies insecticides was sprayed in this Plants community. Which of the following graphs correctly depicts the changes in numbers of mice, caterpillars and sparrowhawks over time?

A.

B.

C.

D.


8


Class 7

Set A

Year 2018

LOGICAL REASONING

1.

Find the missing number, if a certain rule is followed either row-wise or column-wise.

A. C.

5

12

4

8

9

15

3

12

8

20

4

?

16 12

B. D.

6.

K E Y

3.

4.

20

26 None of these

8.

Select a gure from the options in which the given gure is exactly embedded as one of its parts.

A.

B.

C.

D.

Sumit is fourteenth from the right end in a row of 35 boys. If rst two boys from the left end leave the row, then what is Sumit’s position from the left end? A. C.

5.

B. D.

25

20th 21st

B. D.

9.

10.

A. C.

5 6

B. D.

A.

B.

C.

D.

If ‘K’ denotes ‘×’, ‘B’ denotes ‘÷’, ‘T’ denotes ‘–’ and ‘M’ denotes ‘+’, then 40 B 8 T 6 M 3 K 4 = ? 19 –31

B. D.

11 23

Two positions of a dice are shown below. below. When number 5 is at the bottom, then which number will be on the top?

6

4 Can’t be determined

Select a gure from the options which satises the same condition of placement of the dots as in the given gure.

2

D.

K E Y

D.

B.

C.

Y E K

B.

If in a certain code language, ‘546’ is written as ‘you are best’, ‘538’ is written as ‘you can do’ and ‘692’ is written as ‘all are good’, then which digit is written as ‘best’?

A. C.

19th 18th

Which of the following Venn diagrams best represents the relationship amongst, “Stationery, Pen, Scale”? A.

Y E K

C.

14 15

Count the number of squares in the given gure.

A. C.

K E Y

A.

7. 2.

Select the correct water image of the given figure.

A. C.

2 4

1 1

6

B. D.

5

3 Can’t be determined

SCIENCE

11.

A speed-time ( v -t ) graph of an object is shown in the gure. –1

v(m s )

Which of the following best describes the graph? A. B. C. D.

t (s) (s)

2

The object drops through vacuum. The object drops through air. The object is being thrown downwards through vacuum. The object is being thrown downwards through air. | NSO | Class-7 | Set-A | Level 1

12.

An object O is placed in front of a plane mirror MN as shown in the diagram. A student moves her eye along the line XY to observe the image of O. Identify the point(s) on the line XY where the image of O can be seen. M

17.

P. Q. R. S. A. B. C. D.

N

O X

Y

I

A. C. 13.

II I

I, II and III only II and III only

B. D.

IV

I, III and IV only IV only

A train leaves a station X at 5:00 pm and reaches another station Y at at midnight. Its speed is 90 km h –1. What is the distance between X and Y ? A. C.

14.

II

480 km 800 km

B. D.

18.

630 km 830 km

Read the given statements and select the correct option.

motion of a wheel of a moving bicycle bicyc le is same as a s the motion moti on of a mark o n the blades b lades of a moving electric fan. A.

X

B. C. D.

Y

19.

15.

16.

L1

Metal X is is a better conductor of heat than metal Y . Metal X is is a poorer conductor of heat than metal Y . Metal X is is of better quality than metal Y . Metal X is is more exible than metal Y .

40 km/h 48 km/h

B. D.

M 1

Magnet

II

III

IV

Steel bar

If the steel bar was divided into parts I, II, III and IV, which of these parts would be the north-pole? A. C.

I III


B. D.

L3

L4

M 3

A. B. C. D. 20.

Only M 2 and M 3 are insulators of electricity. Only M 1 and M 3 are insulators of electricity. Only M 1 and M 2 are conductors of electricity. Only M 1 and M 3 are conductors of electricity.

Following are the precautions one must take in case a storm is accompanied by lightning. (i) (ii)

N I

L2

If L2 , L3 and L4 are the only lamps that light up, then which one of the following conclusions can be made?

45 km/h 53 km/h

A student used the stroking method to magnetise a steel bar as shown in the gure.

L5

M 2

A car travels 40 km at an average speed of 80 km/h and then travels 40 km at an average speed of 40 km/h. The average speed of the car for this 80 km trip is A. C.

Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. Statement 1 is true but statement 2 is false. Statement 1 is false but statement 2 is true.

Five lamps L1, L2 , L3, L4 and L5 and three dierent types of materials M 1, M 2 and M 3 are used in the circuit shown.

After heating it, she observed that the metallic strip curved as shown in the gure. Which of the following would best explain the conclusion derived by Aparna about the experiment she had done? A. B. C. D.

Solar eclipse Inverted image Lunar eclipse

Statement 2 : The

Clamps

After heating

Column II

Reection

motion is the motion along a curve traced out by a moving object such that its distance from a xed point is constant.

Y

Metallic strip

Column I

Shadow of the moon (i) falling on the earth Pinhole camera (ii) Full moon day (iii) Bouncing back of light (iv) P - (i), Q - (ii), R - (iii), S - (iv) P - (ii), Q - (iii), R - (iv), S - (i) P - (iv), Q - (iii), R - (ii), S - (i) P - (i), Q - (iii), R - (ii), S - (iv)

Statement 1 : Circular

Aparna heated a bi-metallic bi-metallic strip made of two dierent types of metals for some time. X

Match column I with column II and select the correct option from the given codes.

II IV

Do not take shelter under a tree. Do not take shelter under an umbrella with a metallic end. (iii) Do not take shelter in open garages, storage sheds, etc. (iv) Do not take shelter in a bus in the open eld. Which one of these is not correct? A. (i) B. (ii) C. (iii) D. (iv) 3

21.

A class 7 science teacher arranged the following set of test tubes. 10 mL Potassium hydroxide + 5 mL Orange juice

II.

Centrifugation Centrifugation is used in laboratories laboratories for separating separating plasma and platelets from blood. III. A solution in which some more solute can be dissolved at xed temperature is called a saturated solution. IV. IV. Winnowing is used to separate husk and hay from grains. A. II only B. II and IV only C. IV only D. I and III only

10 mL Sulphuric acid + 5 mL Window cleaner (1)

15 mL Sodium hydroxide + 10 mL Vinegar

(2) 1 teaspoon Curd + 10 mL Tamarind juice

(3)

26. (4)

Which of the following observations is correct when these solutions were tested with dierent indicators? A. B. C. D. 22.

23.

24.

C. D.


Which of the following statements is/are correct? I.

The process of sedimentation can be made slower by loading.

Column I Column II (Salts) (Uses) Baking soda (i) In making re-works Nitre (ii) As a fungicide Blue vitriol (iii) In purication of water Phitkari (iv) In re extinguishers P-(iii), Q-(ii), R-(iv), S-(i) P-(iv), Q-(iii), R-(i), S-(ii) P-(iv), Q-(i), R-(ii), S-(iii) P-(ii), Q-(i), R-(iv), S-(iii)

27.

A few changes are given below : a. Making almirah from wood b. Galvanisation of an iron pot c. Making an aeroplane from a paper d. Formation of acid rain from air pollutants e. Photosynthesis f. Breaking of vase Classify these changes into : I. Irreversible-physical change II. Chemical change III. Reversible-physical change A. I - a, f II - b, d, e III - c B. I - a, b, e II - d, f III - c C. I - a II - b, d III - c, e, f D. I - f II - c, e III - a, b, d

28.

Namita was given four liquids, 1, 2, 3 and 4. These liquids were added to four beakers lled with water separately and stirred. She stirred. She recorded her observations as follows : Liquid 1 + water → Immiscible liquids Liquid 2 + water → Miscible liquids Liquid 3 + water → Immiscible liquids Liquid 4 + water → Miscible liquids What could liquids 1, 2, 3 and 4 respectively be? 1 2 3 4 A. Glycerine Lemon Shampoo Dye colour juice B. Diesel Alcohol Sugar syrup Mustard oil C. Vegetable Honey Petrol Ink oil D. Milk Glucose Tomato Tomato Kerosene solution juice

Read the given given statements and select select the correct correct option. Statement 1 : A salt is produced when an acid is neutralised by a base. Statement 2 : A salt can be acidic, basic or neutral.

B.

4

Breaking of an earthen pitcher Freezing of ice-cream Falling of trees during storm Filling of bucket with water Rusting of a bicycle Digestion of food (i), (iii), (v) and (vi) only (i), (iii) and (vi) only (ii) and (iv) only (v) and (vi) only

Which of the following statements is incorrect? A. Carbon dioxide turns lime water milky. B. Breaking down of ozone is a chemical change. C. Production of biogas from animal waste is a physical change. D. For rusting, the presence of both oxygen and water is essential.

A.

25.

P. Q. R. S. A. B. C. D.

In test tubes 1 and 3, turmeric solution remains yellow. In test tubes 2 and 4, China rose indicator turns magenta. Methyl orange turns red in test tubes 1 and 3. Phenolphthalein turns pink in test tubes 2 and 4.

Which of the following changes (i - vi) from the given list cannot be reversed? (i) (ii) (iii) (iv) (v) (vi) A. B. C. D.



29.

Pick the odd one out from each series given below and select the correct option. (i) Muga, Kosa, Cashmere, Tussar (ii) Larva, Pupa, Silk moth, Tadpole Tadpole (iii) Patanwadi, Marwari, Pashmina, Lohi (i (i)

A. B. C. D. 30.

M ug a Cas h mer e Cas h mer e Ko s a

(ii)

A. C. 33.

Cotton Wool

B. D.

Silk Polyester. Polyes ter.

Refer to the given gure showing life cycle of an insect and statements associated with it.

(iii)

Pu pa Tadpole adpole L ar va S heep

P at anw adi Pashm Pashmina ina Ma rw ari Lo hi

P Q

Observe the given gure representing substances ( P , Q, R and R and S ) taken in or given out during photosynthesis and select the incorrect option regarding them.

S

P

R Q

R

(a) (b)

S

A.

Q could be the gas which is fixed through

photosynthesis to form carbohydrates whereas P could be the gas which is used by plants in respiration. B. P is is the gaseous by-product of photosynthesis whereas S is carbohydrate formed by plants through photosynthesis. C. Q is taken up by plant leaves directly from atmosphere through minute stomata present in them whereas R represents water absorbed from soil through plant roots. D. R and S show show unidirectional movement within the plant body, i.e., from source to sink.

Commercial silk is obtained from ____ (i) ____ stage. ____ (ii) ____ stage undergoes four moults to become _____ (iii) ____.

Select the option which correctly lls blanks (i), (ii) and (iii). A. B. C. D. 34.

(i) S P R Q

(ii) Q S Q R

(iii) P Q R S

Refer to the given graph representing temperature gradient through dierent regions of Earth. 50 re ut

31.

B.

C.

D.

32.

Varun would not be able to digest carbohydrates and proteins properly because gall bladder stores bile which consists of amylase and pepsin enzymes. enzymes. Varun would not be able to digest fats properly because gall bladder stores bile juice which helps in emulsication of fats. Varun would not be able to digest fats properly because gall bladder secretes bile juice which helps in digestion of fats. Varun would not be able to absorb vitamin B and C properly because gall bladder secretes bile which helps in absorption of these vitamins.

Taru wanted to test the quality of fabric of her muer. muer. She pulled a small strand of yarn from the muer and burned burn ed it. i t. It I t smelle s melle d like li ke a burning burn ing hair. She S he infer i nferred red that the muer is made up of


) p (

C° e

Varun got his gall bladder removed surgically as he was diagnosed with stone in his gall bladder. Which of the following problems is Varun most likely to face after surgery? A.

ar m

S P

e T

0 –25

Q

Biomes

R

Identify labelled parts P - S and select the correct statement regarding them. A. B. C.

D.

35.

Animals inhabiting S possess possess blubber. Animals inhabiting R R may have small body appendages to reduce the exposed surface area. Animals inhabiting P do not drink water and use only metabolic water to fulfill their water requirements. Animals inhabiting Q undergo aestivation whereas animals inhabiting S undergo undergo hibernation.

Which of the following options contains only complete owers? A. B. C. D.

Papaya, Gulmohar, Mulberry Mustard, Date palm, Cucurbit Hibiscus, Hibiscus, Mustard, Petunia Mustard, Petunia Mulberry, Coconut, Castor 5

36.

A large area of forest was cleared by burning. Which of the following statements is/are correct regarding the consequences of this activity? Increase in soil erosion as soil is directly exposed to wind and rain. (ii) The land will have more fresh air as there are lesser trees to take in oxygen. (iii) (iii) Wildlife will easily thrive in the cleared area because more space is available now. (iv) New trees will grow faster and replace the burnt forest soon as the ash of the burnt trees will make the soil more fertile. A. (i) only B. (i) and (iv) only C. (i), (ii) and (iv) only D. (i), (ii), (iii) and (iv)

Select the option which satises the same relationship. A. B. C. D.

(i)

37.

40.

Beaker Salt solution Semi permeable membrane

38.

F T T T

T T F T

F F T T

A. B. C. D. 41.

A. B. C.

Ribs Lung

Rib cage

39.

Diaphragm

D.

42.

Down and in Contracts Up and out Relaxes

High High

C. D.

Up and out Contracts Down and in Relaxes

Low Low

Refer to the given relationship based on mode of seed dispersal. Hiptage Hipt age : Xanthiu Xan thiu m : Coconut

6

Function

Example

Root

(i) Climbing (ii) Storage

P Q

Stem

(i) Climbing (ii) Protection

R S

Leaf

(i) Climbing (ii) Reduction in water loss

T U

P could could be betel, S could could be Bougainvillea be Bougainvillea and and U could be Opuntia. Opuntia. Q could be ginger, R R could be grapevine and T could be pea. P could be ivy, R R could be spinach and T could be orchid. P could could be tapioca, S could could be rose and U could could be Bougainvillea be Bougainvillea..

Refer to the given table representing three dierent types of soils X soils X , Y and Z and Z and and their respective percolation rates of water.

Lung pressure

A. B.

Y Increases Increases Decreases Decreases

Plant part

Observe the given gure.

What will be the condition of the given structures when we breathe in air?

X Decreases Increases Decreases Increases

Refer to the given table and select the correct option regarding P regarding P -U .

T T F F

Diaphragm

Distilled water

Which of the following is correct regarding the volume of liquid in beaker ( X ( X )) and volume of salt solution in tube (Y ( Y )? )?

(i) (i)

A. B. C. D.

Refer to the given experimental set-up. Tube

Consider the following statements and select the option which correctly identies true (T) and false (F) ones. In cockroaches, air enters the body through spiracles. (ii) During heavy exercise, we get cramps in the legs due to accumulation of carbon dioxide. (iii) Normal range of breathing rate per minute in an average adult person at rest is 12-18. (iv) During exhalation, the ribs move upwards. (i) (ii) (iii) (iv)

Urena : Urena : Balsam : Castor Acer : : Calotropis : Calotropis : Lotus Pea : Dandelion : Dandelion : Water lily Drumstick : Urena : Urena : Lotus

Type of soil

Percolation rate

X Y Z

4 mL/min 10 mL/min 7 mL/min

Identify soils X , Y and Z and select the incorrect statement regarding them. A. B.

Soil X Soil X could could be the most suitable soil for growing paddy. paddy. Soil Z Soil Z could could be the most suitable soil for growing cotton. | NSO | Class-7 | Set-A | Level 1

C. D. 43.

Soil Y could be ploughed easily whereas soil X would be dicult to plough. None of these

convert the dead organic waste generated in forest into simpler substances which can be then reused by organisms R R for their growth and development. Identify P Identify P , Q and R and R and and select the correct statement.

Read the given passage.

A.

There are 3 types of blood cells, X , Y and Z . X is bic onc ave dis c sha ped and con tai ns hae mog lob in. Y protects us from many diseases and helps ght infection. Z helps in blood clotting.

B. C.

Select the incorrect option regarding X , Y and Z . A. B. C. D.

44.

People living in higher altitudes have higher X count as compared to people living in plains. High Y count count indicates some infection in the body. Decrease in Z in Z count count also indicates infections like dengue. People with very low X count continue to bleed even from minor injury as their blood does not clot. cl ot.

D.

45.

P and and Q could be bacteria and fungi respectively whereas R could be plants. P and and Q could be bacteria and plants respectively whereas R whereas R could could be fungi. P and and Q could be plants and animals respectively whereas R whereas R could could be bacteria. P and and Q could be herbivores whereas R could R could be a detritivore.

Which of the following is not a reex action? A.

Blinking of eyes

B.

Sneezing on entry of some dust or foreign particles in respiratory system

Read the given passage carefully.

C.

Learning to play guitar

The organisms P organisms P and and Q occur on the forest o or. They

D.

Withdrawal of hand on touching some hot object

ACHIEVERS SECTION

46.

Leena had set up the experiment as shown in the gure.

Insect

Bird

A.

Steel nail

n o i t a l u p o P

Hawk

B.

Insect

Bird

n o i t a l u p o P

Hawk

Time

Time Insect

C. Set-up X Set-up X

47.

IV. IV.

The batteries used in set-up X set-up X are are more expensive. There are more batteries used in set-up X . The number of turns of coil around the nail in set-up Y is is fewer than in set-up X . A longer wire was used in set-up X .

A.

I and III only

B.

II, III and IV only

C.

II and III only

D.

I, II, III and IV

Insect

D.

Bird Time

48.

Hawk Bird Insect Time

Observe the given gure carefully.

Gas ‘ X X ’

Zinc granules

Dilute sulphuric acid

In the given gure, (i) reaction takes place which is a chemical change. (ii) being more reactive react ive than (iii) produces gas ‘ X ’ X ’ which is (iv) and it burns with a (v) .

Bird

Hawk

In an operation to eradicate disease spreading insects, insecticide was sprayed in this locality on a large scale. Select the graph that correctly depicts the population changes of dierent species involved here, with time. NSO | Class-7 | Set-A | Level 1 |

u p o P

n o i t a l u p o P

Read the given passage and ll in the blanks by selecting an appropriate option.

Refer to the given food chain. Pl ant

Hawk

Set-up Y

S he found out that the steel nail in set-up X had attracted more iron pins than the steel nail in set-up Y . What could be the reason for this? I. II. III.

n o i t a l

(i)

(ii)

A.

Oxidation

Zn

H

SO 2

dazzling light

B.

Displacement

H

Zn

H2

pop sound

C.

Displacement Zn

H

H2

pop sound

D.

Reduction

S

SO 2

rotten egg smell

Zn

(iii) (iv)

(v)

7

49.

Refer to the given dichotomous key. key. I.

50.

(a) It can synthesise its own carbohydrates. -Go to II

Refer to the given Venn diagram and select the incorrect option. Animal Z Animal with which streamlined possesses Y body endoskeleton

(b) It cannot synthesise its own carbohydrates. -Go to III II.

(a) It grows in nitrogen decient soil. – P

X

(b) It depends on living host for water and mineral. -Go to IV III.

IV. IV.

(a) It is a stem parasite.

– Q

(b) It is a root parasite.

– R

(a) It is a stem parasite.

– S

(b) It is a root parasite.

– T

Select the option which correctly identies P – T . P Q R S T A. Mistletoe Rafesia Cuscuta Cuscuta PseudoPseudo- Nepe Nepenth nthes es monas B. Rafesia Pseudo- Dionaea Cuscuta Sandalmonas wood C. Nepenthes Mistletoe Mistletoe Rafesia Pseudo- Cuscuta monas D. Dionae Dionaea a Cuscut Cuscuta a Rafesia Mistletoe Sandalwood

Animal with sticky pads on feet

A.

Animal Y - Penguin

B.

Z - Chameleon

C.

X - Octopus

D.

Z - Pangolin

Characteristics • Wings modied into ippers • Possesses blubber • Long sticky tongue • Prehensile tail • Bears eight arms • Squirts ink to escape predators • Armoured shell as outer body covering for protection • Ability to curl into a ball when threatened threatened


8


Class 7

Set B

Year 2018

LOGICAL REASONING

1.

There are six children P, Q, R, S, T and U playing football. P and T are brothers. U is the sister of T. R is the only son of P’s uncle. Q and S are the daughters of the brother of R’s father. How many female players are there? A. C.

2.

1 3

B. D.

2 4

6.

A.

B.

C.

D.

Choose the box that is similar to the box formed when the given sheet is folded.

In the English alphabetical series, if A interchanges its position with B, C with D, E with F and so on up to Y and Z, then _______ will be the seventh letter from the right end.

A.

A. C. 7.

S G

B. D.

T H

B.

Select a gure from the options which does not satisfy the same condition of place ment of the dots as in the given give n gure.

C.

A.

B.

C.

D.

D.

3.

Select a gure from the options in which the given gure is exactly embedded as one of its parts. 8.

Find the correct mirror image of the given gure.

LOGIC A.

B. Mirror

C. 4.

In a coding language, the digits 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 are substituted by a, b, c, d, e, f, g, h, i and j. If 10 is written as ba, then (cd + ef) × bc is equal to _________ ____ _____ . A. C.

5.

D.

684 916

B. D.

816 1564

9.

B.

LOGIC

C.

LOGIC

D.

C I G O L

Select the option which will continue the given series. A. C.

10.

2

C I G O L

A50G, I306O, Q818W, Y650E, ?

Select a gure from the options which will complete the given gure matrix.

?

A.

H245J G218M

B. D.

G245M M218G

Kirti walks 10 km towards North. From there, she walks 6 km towards South. Then, she walks 3 km towards East. How far and in which direction is she now with respect to her starting point? A. C.

5 km North-West North-West 7 km West

B. D.

7 km South-West South-West 5 km North-East


SCIENCE

11.

A person is running along a circular track of area 625 p m 2 ( p = 22/7) with a constant speed. Find the displacement in 15 seconds if he has to complete the race in 30 seconds. A. C.

12.

14.

100 m 50 m

35° 70°

B. D.

A. C. 17.

Mirror

40° 80°

Glass In the given experimental container set-up, when a magnet was brought brou ght ne ar the side of the th e Water beaker, beake r, it attracted attr acted some of Nails the nails. Sand What does this experiment show? I. The nails are magnets. II. The nails are made of magnetic materials. III. III. Magnetism can only pass through the glass container. IV. IV. Magnetism can pass through sand, water and glass. A. I only B. II and III only C. III only D. II and IV only

18.

A.

Y , X , Z , W W , Z , Y , X

Q. R. S.

Column I The material materi al of the filament of a bulb Electric source Conductor Insulator

A.

P - (iv), Q - (iii), R - (i), S - (ii)

B.

P - (iii), Q - (iv), R - (ii), S - (i)

C.

P - (iii), Q - (iv), R - (i), S - (ii)

D.

P - (iv), Q - (iii), R - (i), S - (ii)

(i) ( i)

Column II Tap water

(ii) Pure water (iii) Tungsten (iv) Dry cell

Read the given statements and select the correct option.

Statement 2 : Shadow is the dark patch formed when an object obstructs the path of light. A. B. C. D. 19.

Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. Statement 1 is true but statement 2 is false. Statement 1 is false but statement 2 is true.

In the set-up shown here, the bulb has lighted up. Bulb

B.

Wire Battery

A

Metal plates

V

C.

B. D.

Statement 1 : The colour of the shadow of an object depends on the colour of the object.

Check if it can repel glass. Check to see whether it conducts heat easily. easily. Place some paperclips near it. I only B. III only I and II only D. II and III only

Which of the following diagrams represents a short circuit?

Y , X , W , Z X , Y , W , Z

Match column I with column II and select the correct option from the given codes. P.

How do we we check check whether an electromagnet is working? working? I. II. III. A. C.

15.

B. D.

The diagram shows a ray of light striking a plane mirror. What is the angle of incidence if the angle between the incident ray and the reected ray is 80°? A. C.

13.

200 m 25 m

He placed the lighted candle below the metal rod at posi tion M . He used the same amount of wax to hold all the thumbtacks at positions W , X , Y and and Z on on the rod. Arrange the thumbtacks according to the time they take to drop from the rod, from the rst to the last.

R

D.

R

Glass beaker Liquid X Liquid X

16.

Rohan set up an experiment as shown here. W Wax

X

Y

Z

M

Thumbtack

Table


Metal rod

Which of the following statements about liquid X is/are correct? I. II. III. A. C.

Liquid X Liquid X is is a good conductor of electricity. Liquid X Liquid X is is able to produce electricity. Liquid X Liquid X is is not a good conductor of electricity. I only B. II only III only D. I and II only 3

20.

21.

If the time taken by the bob of a pendulum to move from point R t R to o P is is 4 s, then the time taken by it to complete its one oscillation is A.

8s

B.

12 s

C.

16 s

D.

4s

A. B. C. D.

Q 4s

R

B. C. D.

Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. Statement 1 is false and statement 2 is true. Both statements 1 and 2 are false.

Find the incorrect match. Mixtures

25.

Read the given statements and select the correct option. Statement 1 : Electrolysis of water is a displacement reaction. Statement 2 : Water gets broken down to form hydrogen and oxygen. A.

22.

P

24.

Sugar powder and cornakes Ladyngers and tomatoes Safety pins and rubber bands Glass marbles and grapes

-

Methods of separation Sieving Winnowing By using magnet magnet Handpicking

Study the given Venn diagram.

X

Centre point ‘ X ’ represents A. B. C. D. 26.

Kanika has taken a few objects in a beaker as shown in the given gure.

Eruption of volcanoes Burning of paper Rusting of bicycle Ripening of guava.

Given gure shows the colour changes when China rose indicator is added in test tubes I, II and III. Identify the solutions present in test tubes I, II and III.

1. Glass marbles 2. The Thermo rmocol col 3. Gold coin 4. Wooden block block

I (Magenta)

She added water into the beaker until it was half lled. Which of the objects in the beaker will move upto the water surface? A. C. 23.

2 only 3 and 4 only

B. D.

A.

2 and 4 only 1 and 3 only

B. C.

Seema conducted an experiment to test the nature of four dierent samples. She noted down her observations in the given table. Eect on Sample Turmeric solution

China rose indicator

Methyl orange indicator

W

Red

G re en

Yellow

X

Yellow

M agen ta

Red

Y

Yellow

L ig ht pi nk

Or ang e

Z

Red

G re en

Yellow

D.

27.

A. B. C. D.

4

and Z are are basic, X is is acidic and Y is is neutral in W and Z nature. W is acidic, X is basic, Y and Z are neutral in nature. W and Z and Z are are acidic, X acidic, X is is basic and Y is is neutral in nature. Y is is neutral, W and X and X are are basic and Z is is acidic in nature.

28.

II Lime water Lemon juice Sugar solution Sugar solution

III (Green)

III Baking powder Vinegar Vinegar

Lemon juice Lime water

Match column I with column II and select the correct option from the given codes. P. Q. R. S. A. B. C. D.

Which of the following conclusions can be drawn from this experiment?

I Sugar solution Sugar solution Lime water Lemon juice

II (No colour change)

Column I Fast change (i) Periodic change (ii) Reversible change (iii) Undesirable change (iv) P-(iii), Q-(iv), R-(ii), S-(i) P-(iii), Q-(iv), R-(i), S-(ii) P-(i), Q-(iii), R-(iv), S-(ii) P-(iv), Q-(ii), R-(iii), S-(i)

Column II Crystallisation Earthquake Bursting of crackers Change Change of season

Which of the following groups of acids contains only weak organic acids? A. B. C. D.

Acetic acid, Formic acid, Nitric acid Acetic acid, Ascorbic acid, Formic acid Hydrochloric acid, Sulphuric acid, Formic acid Citric acid, Lactic acid, Sulphuric acid | NSO | Class-7 | Set-B | Level 1

29.

Refer to the given food chain. P

Q

R

D. S 32.

T

30.

Identify P Identify P -T and and select the incorrect statement. A. All the organisms of the food chain depend on P directly or indirectly for food. B. Q and R and R in in the given food chain are herbivore and carnivore respectively. respectively. C. T helps helps in keeping our environment clean and in recycling of nutrients. D. S obtains obtains its food directly from the plants and is called primary consumer.

Study the given table. Minera Mineral/V l/Vitam itamin in Decie Deciency ncy dise disease ase

A.

B.

C.

D.

A. B. C. D.

31.

Unisexuality of owers prevents processes X processes X and and Y . Seed setting is assured in process X even in the absence of pollinators. Processes X and Z are not possible in cucurbits and papaya. In processes Y and Z and Z , genetically dierent pollen grains are brought to stigma.

P

It secretes digestive enzymes.

Q It takes part in digestion of fats.

Identify P and Q and select the correct statement. A.

B.

C.

Q produces a juice which gets mixed with fats presen pre sentt in food foo d and conver con verts ts it into int o small sma ll fat droplets. Q secretes a digestive juice which acts on carbohydrates, fats and proteins and converts them into glycerol, fatty acids and amino acids, respectively. P could could be the smallest organ of digestive system whereas Q could the longest portion of alimentary canal.


P

Q

Rickets

Iodine

R

S

Scurvy

P can be treated by consumption of green leafy vegetables, red meat, etc., whereas R whereas R can can be treated by consuming sea food, iodised salt, s alt, etc. In P In P , oxygen carrying capacity of blood is reduced whereas R R is characterised by enlargement of thyroid gland. Our body can manufacture Q in the presence of sunlight whereas S is is present in citrus fruits like amla, amla, lemon, etc. All of these

Refer to the given gures.

P

C. D. 34.

Q

R

Identify P - R R and select the correct option. A. B.

Refer to the given Venn diagram. It is an organ of digestive system.

33.

Iron

Identify P Identify P , Q, R and R and S and and select the incorrect option regarding them.

Refer to the given gure.

Select the correct statement regarding processes X , Y and Z .

P absorbs water and salt from undigested food whereas Q is the site of absorption of digested food.

R is R is the non-feeding stage of silk moth. The salivary glands of the insect at only P stage stage secrete bres made of proteins. Q undergoes moulting four times to become an adult and feeds on mulberry leaves. Both A and C

The given graph shows rates of heartbeat heartbeat in Mr X and Mr Y. t a e ) b t n r i a m e h / s70 f t o a e b e ( t a R

O

Mr X

Mr Y Individuals

Select the incorrect option regarding this. A. Mr X may be doing some exercise due to which his heartbeat rate has increased in order to supply more oxygen to his body cells. B. Mr Y is in deep sleep state so his body cells do not require any oxygen hence his heartbeat rate has gradually reduced to 0. C. Mr X may be watching some scary movie which has triggered stress and has increased his heartbeat rate. D. None of these 5

35.

Consider the following statements. Select the option which correctly identies true (T) and false (F) ones. Microorganisms act upon the dead plants to produce humus. (ii) Autotrophs lie at the base of a food chain. (iii) Large scale cutting of trees is called aorestation. (iv) Branched part of a tree above the stem is called crown. (i) (ii) (iii) (iv) A. T F T F B. T T F T C. T F F T D. T F T T

(i)

36.

39.

Refer to the given ow chart and select the option which correctly identies P , Q and R. R. It is an animal. Yes

40.

It possesses backbone. Yes Yes

Its body is covered with No feathers. Yes

A. B. C. D.

Column I Earthworm Earthw orm (i) Human (ii) Prawn (iii) Insects Insect s (iv) P-(i), Q-(ii), R-(iii), S-(iv) P-(iv), Q-(i), R-(ii), S-(iii) P-(iii), Q-(ii), R-(iv), S-(i) P-(iv), Q-(ii), R-(i), S-(iii)

Column II Pulmonary respiration Branchial respiration Tracheal respiration Cutaneous respiration

Study the given table. Identify X and and Y and and select the correct statement.

Q

Y

It is is reta retard rded ed meta metabo boli licc It is retarded metabolic state that helps in state that helps in escaping harsh winters. escaping scorching summers.

(ii) (ii) It is is of lon longe gerr durat duration ion It lasts for hot dry and lasts for the whole day time as nights are duration of winter. cooler.

R Seal Shark Spadefoot toad Spoonbill

A. B.

C.

37. Observe the given figure and select the correct statement(s) regarding P -S . R

P. Q. R. S. A. B. C. D.

(i)

P

R

Q Frog Toucan Stork Walrus


X

It breathes through gills. No

P Kite Frog Krait Shark

(iv) It is a proteinaceous bre. Fibre X Fibre X could could be A. Nylon B. Silk C. Cotton D. Polyester.

D.

P

X could be hibernation exhibited by polar bear whereas Y whereas Y could be migration exhibited by penguin. X could be hibernation exhibited by polar bear whereas Y could be aestivation exhibited by salamander. X could could be aestivation exhibited by tortoise whereas Y could could be hibernation exhibited by penguin. X could be migration exhibited by hedgehog whereas Y could could be aestivation exhibited by snakes.

Q

41.

Refer to the given experimental set-up. Y Water 5M salt solution

X

S

2M salt solution

(i) The given gure shows the process of pollination. (ii) P secretes sugary solution which stimulates the germination of R of R.. (iii) Male gametes are formed inside the Q. (iv) S contains contains fertilised ovule which contains zygote. A. (i) and (iii) only B. (ii), (iii) and (iv) only C. (i), (ii) and (iv) only D. (iv) only

38.

Dialysis tube

Which of the following graphs correctly represents changes in the liquid levels of X and and Y at at the end of experiment?

A.

Read the given characterist ics of a bre. (i) (ii)

It is a natural bre. It is a bad conductor of heat so it remains cool in summer and warm in winter. (iii) It has a unique natural lustre and the fabric is very smooth. 6

C.

l e v e l d i u q i L l e v e l d i u q i L

Y X

B.

l e v e l d i u q i L

Time X

D. Y Time

l e v e l d i u q i L

Y X Time Y

X Time


42.

The given given bar bar chart chart shows the concentration of oxygen oxygen in blood samples from four places in the circulatory system of a man. Which sample was taken from the pulmonar pulm onary y artery? arte ry?

B. C. D. 44.

Reduction in number of Y leads leads to excessive loss of blood from the wound. The count of Z goes down when there is any infection in the body. Both B and C.

Refer to the given ow chart. Edible root No

Yes

Edible seeds No

A. C. 43.

P R

B. D.

Q S

Edible stem

Yes

Q

Yes

Grows below ground No

Yes

R

S

Observe the given gure of blood smear prepared by a lab professional.

Select the correct statement regarding P -S . A. P could could be potato whereas Q could be clove. B. S could could be sugarcane whereas R could R could be ginger. C. P could could be garlic whereas S could could be cocoa. cocoa . D. R could R could be turnip whereas Q could be cumin.

Y Z

45.

Select the correct match. Plant

X

A. B. C. D.

Identify cells X , Y and Z and select the correct statement. A.

P

X produces special protein substances called antibodies that protect us from infection.

Banana Grass Radish Onion

Type of root system Fibrous Tap Tap Tap

Type of venation Reticulate Parallel Reticulate Parallel

ACHIEVERS SECTION

46.

(i)

Observe the given gures carefully.

Magnesium ribbon burning with a dazzling light 47.

( P ) ( P P ) + H2O

(ii)

(iii)

Physical

Mg

MgO.2H2O

Cu

Ag

B.

Chemical

MgO

Mg(OH) 2

Cu

Fe

C.

Chemical

Mg(OH) 2

MgO

Fe

Cu

D.

Physical

Mg(NO3)2

MgO

Zn

Al

Study the given flow chart carefully and select the option that correctly identies P , Q and R. R. It is an autotrophic plant.

(Q)

No

P

Yes

It grows in nitrogen No decient soils. Green colour solution of (Y ( Y )

( X X ) Figure 2 Read the given passage and ll in the blanks by selecting an appropriate option. Figures 1 and 2 both represent a (i) change. In gure 1, P is (ii) and Q is (iii) . In gure 2, X and Y can be (iv) and (v) respectively.

Q

Yes R

A.

(Y )


(v)

A.

Figure 1

Blue colour solution of ( X ) X )

(iv)

B. C. D.

P could be any parasitic leaess plant such as mistletoe which depends on the host plant for water and minerals. R R could be Di on ae a which has special leaf modication to catch and digest insects. Q could be Cuscuta which is rootless photosynthetic plant. All of these

7

48.

A speed-time ( v-t ) graph of an v(m s –1) object is shown in the gure.

(b) Its seeds are dispersed through water. - T A.

Which of the following best describes the graph? A. B. C. D. 49.

B.

The object travels at decreasing acceleration. t (s) (s) The object travels at constant deceleration. The object travels at increasing deceleration. The object travels at decreasing deceleration.

Refer to the given dichotomous key key and select the incorrect statement regarding P -T . I.

II.

III.

IV. IV.

(a) The plant undergoes vegetative propagation. - Go to II (b) The plant undergoes sexual reproduction. - Go to III (a) The plant propagates vegetatively by stem. P (b) The plant propagates vegetatively by leaf. - Q (a) Its seeds are dispersed through abiotic agent. - Go to IV (b) Its seeds are dispersed through animals. - R

C. D. 50.

P could be be Eichhornia Eichhornia that propagates through osets or Oxalis that Oxalis that propagates through runners. Q could be Br yophyll yop hyll um um whereas R R could be Urena. Urena. could be Balsam. R could R could be Hiptage whereas Hiptage whereas S could Balsam . S could could be Dandelion whereas Dandelion whereas T could could be lotus.

Refer to the given graph d e t s representing percentage e g h i c r of undigested starch in d a n t u s d i f f e r e n t p a r t s o f f o alimentary canal. % P Q R S Identify regions of Regions of alimentary canal alimentary canal P – S and select the correct statement. A. B.

C. D.

(a) Its seeds are dispersed through wind. - S

P could could be mouth, Q could be oesophagus, R oesophagus, R could could be stomach and S could could be small intestine. Digestion of food is completed in R R which also possesses many nger-like projections in its wall that provide a large surface area for the absorption of food molecules. Q secretes digestive juice which contains mucus, and enzyme amylase. P makes makes the medium acidic to help the digestive enzyme to act upon food stu.


8


ANSWER KEYS NSO 2014 SET A 1.

(D)

2.

(A)

3.

(D)

4.

(B)

5.

(B)

6.

(A)

7.

(C)

8.

(A)

9.

(B)

10.

(C)

11.

(A)

12.

(C)

13.

(A)

14.

(A)

15.

(C)

16.

(C)

17.

(C)

18.

(D)

19.

(B)

20.

(B)

21.

(C)

22.

(B)

23.

(C)

24.

(B)

25.

(D)

26.

(A)

27.

(D)

28.

(D)

29.

(B)

30.

(A)

31.

(C)

32.

(D)

33.

(D)

34.

(B)

35.

(D)

36.

(B)

37.

(C)

38.

(C)

39.

(C)

40.

(D)

41.

(C)

42.

(C)

43.

(D)

44.

(A)

45.

(B)

46.

(A)

47.

(C)

48.

(C)

49.

(D)

50.

(D)

SET B 1.

(D)

2.

(D)

3.

(C)

4.

(C)

5.

(D)

6.

(D)

7.

(B)

8.

(C)

9.

(C)

10.

(B)

11.

(B)

12.

(B)

13.

(A)

14.

(C)

15.

(C)

16.

(D)

17.

(A)

18.

(A)

19.

(B)

20.

(D)

21.

(B)

22.

(B)

23.

(C)

24.

(B)

25.

(B)

26.

(B)

27.

(C)

28.

(A)

29.

(D)

30.

(A)

31.

(B)

32.

(B)

33.

(B)

34.

(C)

35.

(D)

36.

(D)

37.

(B)

38.

(B)

39.

(C)

40.

(D)

41.

(A)

42.

(C)

43.

(B)

44.

(B)

45.

(B)

46.

(B)

47.

(C)

48.

(B)

49.

(D)

50.

(C)

(B) (B) (D) (B) (D)

7.

(D) (C) (C) (D) (B)

8.

(D) (C) (B) (C) (B)

9.

(B) (A) (B) (C) (B)

10.

(B) (A) (C) (B) (C)

10.

39.

(D) (B) (B) (B)

40.

(A) (B) (B) (C)

49.

(D)

50.

(A)

9.

(C) (C) (C) (B) (C)

10.

(A) (C) (B) (C) (A)

10.

39.

(D) (B) (B) (D)

40.

(B) (B) (A) (D)

NSO 2015 SET 1 1. 11. 21. 31. 41.

(B) (D) (D) (A) (B)

2. 12. 22. 32. 42.

(C) (A) (C) (A) (C)

3. 13. 23. 33. 43.

(C) (B) (B) (B) (D)

4. 14. 24. 34. 44.

(A) (D) (B) (C) (D)

5. 15. 25. 35. 45.

6.

(B) (D) (D) (D) (C)

16. 26. 36. 46.

17. 27. 37. 47.

18. 28. 38. 48.

19. 29. 39. 49.

20. 30. 40. 50.

SET 2 1.

31.

(B) (A) (B) (D)

41.

(B)

11. 21.

2.

32.

(C) (D) (B) (D)

42.

(D)

12. 22.

3.

33.

(D) (B) (C) (A)

43.

(D)

13. 23.

4.

34.

(D) (D) (A) (D)

44.

(A)

14. 24.

5.

35.

(C) (B) (C) (B)

45.

(C)

15. 25.

6.

36.

(C) (D) (B) (D)

46.

(B)

16. 26.

7.

37.

(B) (D) (C) (B)

47.

(C)

7.

(B) (B) (C) (A) (D)

17. 27.

8.

38.

(D) (B) (D) (A)

48.

(B)

8.

(B) (B) (C) (D) (A)

18. 28.

9. 19. 29.

20. 30.

NSO 2016 SET A 1. 11. 21. 31. 41.

(A) (C) (A) (C) (A)

2. 12. 22. 32. 42.

(A) (C) (B) (D) (C)

3. 13. 23. 33. 43.

(B) (A) (A) (B) (C)

4. 14. 24. 34. 44.

(A) (C) (C) (A) (B)

5. 15. 25. 35. 45.

6.

(D) (A) (D) (B) (C)

16. 26. 36. 46.

(D) (B) (D) (C) (D)

17. 27. 37. 47.

18. 28. 38. 48.

19. 29. 39. 49.

20. 30. 40. 50.

SET B 1.

31.

(B) (B) (A) (B)

41.

(B)

11. 21.

2.

32.

(B) (C) (C) (A)

42.

(C)

12. 22.

3.

33.

(A) (A) (C) (C)

43.

(D)

13. 23.

4.

34.

(B) (B) (C) (D)

44.

(C)

14. 24.

5.

35.

(B) (C) (B) (C)

45.

(B)

15. 25.

6.

36.

(B) (C) (C) (B)

46.

16. 26.

7.

37.

(A) (A) (D) (C)

(B)

47.

(D) (B) (B) (D) (B)

7.

17. 27.

8.

9.

38.

(D) (C) (C) (C)

(B)

48.

(B)

49.

(D)

50.

(C)

(A) (A) (B) (A) (C)

8.

(B) (B) (D) (A) (B)

9.

(B) (D) (C) (B) (C)

10.

(D) (C) (B) (D) (A)

18. 28.

19. 29.

20. 30.

NSO 2017 SET A 1. 11. 21. 31. 41.

(D) (D) (B) (A) (B)

2. 12. 22. 32. 42.

(B) (B) (B) (B) (B)

3. 13. 23. 33. 43.

(A) (D) (A) (C) (C)

4. 14. 24. 34. 44.

(D) (D) (C) (C) (C)

5. 15. 25. 35. 45.

(A) (A) (A) (B) (A)

6. 16. 26. 36. 46.

17. 27. 37. 47.

18. 28. 38. 48.

19. 29. 39. 49.

20. 30. 40. 50.

SET B 1. 11. 21. 31. 41.

(A) (D) (B) (B) (B)

2. 12. 22. 32. 42.

(B) (A) (D) (B) (C)

3. 13. 23. 33. 43.

(C) (A) (D) (B) (C)

4. 14. 24. 34. 44.

(D) (B) (B) (D) (A)

5. 15. 25. 35. 45.

6.

(A) (D) (C) (C) (D)

16. 26. 36. 46.

(B) (A) (C) (A) (D)

7. 17. 27. 37. 47.

(C) (B) (A) (B) (C)

8. 18. 28. 38. 48.

(A) (B) (C) (B) (B)

9. 19. 29. 39. 49.

(A) (A) (D) (C) (C)

10.

(B) (D) (B) (D) (D)

10.

(C) (A) (D) (B) (C)

10.

20. 30. 40. 50.

(D) (A) (B) (B) (D)

NSO 2018 SET A 1. 11. 21. 31. 41.

(C) (C) (B) (B) (A)

2. 12. 22. 32. 42.

(D) (A) (A) (C) (D)

3.

(B) (B) (B) (C) (A)

3.

13. 23. 33. 43.

(C) (B) (C) (C) (D)

4. 14. 24. 34. 44.

(A) (A) (B) (B) (A)

5. 15. 25. 35. 45.

(D) (D) (B) (C) (C)

6. 16. 26. 36. 46.

(B) (A) (C) (A) (C)

7. 17. 27. 37. 47.

(B) (B) (A) (C) (D)

8. 18. 28. 38. 48.

(D) (C) (C) (C) (C)

9. 19. 29. 39. 49.

20. 30. 40. 50.

(A) (D) (D) (A) (C)

SET B 1. 11. 21. 31. 41.

(C) (D) (C) (A) (A)

2. 12. 22. 32. 42.

13. 23. 33. 43.

(A) (D) (A) (D) (B)

4. 14. 24. 34. 44.

(B) (B) (B) (B) (B)

5. 15. 25. 35. 45.

(B) (B) (D) (B) (C)

6. 16. 26. 36. 46.

(A) (B) (D) (D) (B)

7. 17. 27. 37. 47.

(A) (C) (B) (D) (B)

8. 18. 28. 38. 48.

(A) (D) (B) (B) (C)

9. 19. 29. 39. 49.

20. 30. 40. 50.

(D) (C) (B) (B) (B)

Class 7 Nso 5 Year

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