50
8
Level 1
SET 4 10 35 3
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MENTAL ABILITY LOGICAL REASONING LOGICAL REASONING 1.
There is a denite relationship between the gures (i) and (ii). Establish a similar relationship between gures (iii) and (iv) by selecti ng a suitable gure from the options that would replace (?) in gure (iv).
12
80
? (i)
(ii)
(iii)
A. C.
16
B.
207
184 241
B. D.
A.
D.
C.
If in a certain code language, 'FLOWER' is coded as 'UOLDVI', then how is 'TERMINAL' coded in the same language? A. C.
3.
FLKPMROZ RVNIGLKA
B. D.
?
8.
GVINRMZO GVIVGYEO GVIVGYE O
Read the following information and answer the question given below. A is the father of C. But C is not his son. E is the daughter of C. F is the spouse of A. B is the brother of C. D is the son of B. G is the spouse of B. H is the father of G. Who is the grandmother of D? A. A B. C C. F D. H
+
B. +
Fig. (X)
D. +
×
2.
21
210 425
Find the correct water-image of Fig. (X).
+
C.
25
7
(iv) 7.
A.
8
Select a gure from the options in which Fig. (X) is exactly embedded as one of its part. A.
B.
C.
D.
Fig. (X)
4.
9.
Select a box that can be formed by folding the sheet shown in Fig. (X).
Study the Venn diagram carefully and answer the question given below.
Fig. (X)
Which region represents Indian leaders those are singers? A. 2 B. 3 C. 4 D. 5 5.
Kashish goes 30 metres North, then she turns right and walks 40 metres, then again she turns right and walks 20 metres, then again she turns right and walks 40 metres. How many metres is she away from her original position? A. C.
6.
2
10 0
B. D.
10.
A.
B.
C.
D.
Which of the following options satises the same condition of placement of the dots as in Fig. (X)?
Fig. (X) A.
B.
C.
D.
20 40
Find the missing number, if a certain rule is followed in all the three gures.
Class 8 | Level-1
MENTAL SCIENCE ABILITY
11.
Given gure shows that the shape of a part of a long string in which transverse waves are produced. Which pair of parti cles are in phase? phas e?
A. C. 12.
B. C. D.
15.
Concave mirror Convex mirror Plane mirror None of these
A block of wood is oating on water at 0ºC, with a certain volume V above above water level. The temperature of water is slowly raised from 0ºC. How will the volume V change with the rise of temperature? A. B. C. D.
V will will V will will V will will V will will
not change increase decrease till 4ºC and then increase increase till 4ºC and then decrease.
Class 8 | Level-1
B.
Forward with uniform velocity
C.
Backward with non-uniform velocity
D.
Forward with non-uniform velocity. velocity.
To determine the focal length of the mirror, you need to measure the distance between the
19.
A.
Mirror and the screen
B.
Mirror and the object
C.
Object and the screen
D.
None of these
Two electric bulbs, one of 200 V 40 W and the other 200 V 100 W are connected in the house wiring circuit, then A.
They have equal currents through them.
B.
The resistance of the laments in the bulbs is same.
C.
The resistance of the lament in 40 W bulb is more than the resistance in 100 W bulb.
D.
The resistance of the lament in 100 W bulb is more than the resistance in 40 W bulb.
20.
The echo of a sound signal sent by a ship into the sea is detected after two seconds. If the speed of sound in
In which of the following cases, man will always see image smaller than himself ? A. B. C. D.
16.
Heavier Lighter Shows no change in weight Lighter in the beginning and heavier later.
Backward with uniform velocity
formed by a concave mirror is obtained on a screen.
A parrot sitting on the oor of a wire cage which is bein g carr ied by a boy, starts sta rts ying. yi ng. The boy will wil l feel that the box is now A. B. C. D.
A.
18. In an experiment, the image of a distant object
Zero if vehicle is moving with a uniform velocity Towards Towards west if the vehicle is accelerating Towards Towards east always Towards west always.
It acts as freely falling body It has constant acceleration It has constant velocity All of these
In the the given given gure, the part BC represents, a body moving
P and and U S and and V
Which of the following statements is/are true for a satellite in an orbit? A. B. C. D.
14.
B. D.
Consider a vehicle going on a horizontal road towards east. Neglect any forc e by the air. The frictional force on the vehicle by the road is A.
13.
Q and S P and and T
17.
water is 1500 m s –1, how deep is the sea at that point?
21.
A.
150 m
B.
1500 m
C.
3000 m
D.
3500 m
A metal sphere is mounted on a wooden base. It is touched by a negatively charged metal rod. As a result, the sphere will be _______ and the metal rod will be _______. A.
Negatively charged, neutral
B.
Positively charged, neutral
C.
Neutral, neutral
D.
Information not enough to answer.
3
22.
In the gure shown, AB and BC are two mirrors at right angles to each other. DO DO is a ray of light and NO is NO is normal to AB. AB . Find the angle of reection of the ray from BC .
27.
A. C. 23.
60º 30º
They travel at the speed of light They are in the shape of a ray of light They are luminous objects They burn due to friction when entering the earth's atmosphere
28.
5N 11 N
B. D.
7N 13 N
(a) (b) (c)
(d) A. B. C. D.
Column-I Epicentre
29.
30. 26.
Crystallisation
B.
Crystallisation Neutralisation
Indicator
C.
Indicator
Evaporation
Neutralisation
D.
Evaporation
Neutralisation
Desalination
Given below are the uses of a few metals. These uses are based on the properties of the metals. Mark the metal which is not correctly matched. A.
It is good conductor of heat, light weight and can be converted into thin sheets — Aluminium.
B.
It is highly malleable metal and used to make jewellery and ornaments — Gold.
C.
It is good conductor of electricity and used to make electrical wires in households — Lead. It is non-corrosive and used in electroplating and manufacturing stainless steel — Chromium.
Sulphuric acid, an important industrial chemical, is manufactured using three reactions sequentially. In the rst reaction, sulphur is burnt in oxygen and forms sulphur dioxide (SO 2). SO 2 forms sulphur trioxide (SO 3) with oxygen in presence of a catalyst. SO 3 in presence pres ence of water forms form s sulp huric huri c acid.
A.
Displacement, Combination, Neutralisation
B.
Displacement, Displacement, Combination
C.
Combination, Combination, Combination
D.
Combination, Neutralisation, Neutralisation.
Given below are few statements about plastics. Which of the statements is not correct? A.
Plastics can be melted, recycled, reused, coloured and casted into various shapes and sizes.
B.
Monomers of plastics can be linear or cross linked.
C.
Plastics can be burnt and disposed off easily, easily, hence are environmental friendly.
D.
Plastics are non-reactive and do not conduct heat or electricity. electricity.
Read the given sentences and choose the appropriate word which denes them.
Few methods of using energy energy are given to prevent energy crisis. Which of the methods do you nd is not useful in saving energy.
(i)
A substance that changes colour in acidic and basic solutions.
A.
Using bulbs instead of CFLs and tubelights.
B.
(ii)
A reaction in which an acid reacts with a base to give salt and water.
Using public transpor t instead of private vehicles.
C. D.
Soaking pulses for sometime before cooking. Using coolers and air conditioners when it is necessary.
(iii) A process of preparing crystals of a pure substance from its saturated solution.
4
Neutralisation
On the basis of above knowledge, the type of these three reactions respectively are
Match column-I with column-II and choose the correct options from the codes given below. Column-II (i) The record of the seismograph on the graph paper Seismic focus (ii) The point vertically above the seismic focus Seismograph (iii) The fragments into which the earth's lithosphere is divided Tectonic Tectonic plates (iv) The place from where an earthquake originates a – (ii), b – (iv), c – (iii), d – (i) a – (ii), b – (iv), c – (i), d – (iii) a – (iii), b – (i), c – (ii), d – (iv) a – (iv), b – (ii), c – (i), d – (iii)
(iii)
Indicator
D.
Two different forces 3 N and 10 N acts on a football. Which of the following resultant forces is not poss ible? ible ? A. C.
25.
B. D.
(ii)
A.
Meteoroids are called shooting stars because A. B. C. D.
24.
50º 40º
(i)
Class 8 | Level-1
31.
Which of the the following following statements is correct? correct? A. B. C. D.
32.
Which of the the following following indicator(s) indicator(s) does/do does/do not change change colour in acidic solution? A. C.
33.
Any substance that can burn is an inammable substance. In spontaneous combustion, substance starts burning at room temperature. During an explosion, a large amount of acid is produced. Water is useful in putting out all types of res.
Blue litmus paper China rose
B. D.
38.
Which of the following tools will plough the eld in minimum possible time? A.
B.
C.
D.
39.
Refer the given given reactions reactions of nitrogen nitrogen xation xation and select select the option that correctly identies the microorganisms X , Y and Z carrying out the reactions.
(i)
Turmeric Both A and B.
(ii) (iii)
Study the Venn diagram carefully. carefully.
X
Y
Z
A.
Thiobacillus
Nitrobacter
Nitrosomona s
B.
Nitrosomonas
Nitrobacter
Pseudomonas
C.
Nitrosomonas
Nitrosococcu s
Nitrobacter
D.
Nitrobacter
Nitrosomonas
Pseudomonas
Slow
Reversible
Centre point ( •) does not (i) Burning of biogas (iii) Depletion of ozone A. (i) and (ii) C. (ii), (iii) and (iv) 34.
36.
40.
Rusting of iron Crystallisation (ii) and (iv) (i), (ii) and (iii)
Complete the given table and select the correct option for X, Y and Z.
Scouring Spinning
B. D.
A. B. C. D.
Carding Shearing
Below given features are true for which of the soil layers/horizons? ●
It is lighter in colour because of the presence of less amount of humus.
●
It is rich in minerals.
●
It contains roots of some deep-rooted plants.
●
It is hard and compact.
A. C.
Horizon - A Horizon - C
B. D.
41.
Food substance
Digestion begins in
End products
Rice
Mouth
X
Beef
Y
Amino acids
Animal fats
Small intestine
Z
X Glucose Starch Glucose Glucose
Y Stomach Mouth Stomach Stomach
Z Fatty acids + Glycerol Fatty acids + Glycerol Amino acids Sugars
Study the classicati on chart below.
Horizon - B Parent or bedrock.
Which of the following are the results of global warming? A. B. C. D.
37.
represent
Various processes are involved in obtaining wool from the eece of an animal. One of the following processe proc essess used us ed to remov e grease, gre ase, dust , dirt, dir t, et c. fr om the bres by using soapy water is A. C.
35.
Physical
(ii) (iv) B. D.
Either A or C
Melting of ice at the poles. Rise in sea-levels causing oods. Extinction of plants and animals. All of these
Which one of the following sets of organisms best represent P , Q, R R and S ?
P
Q
R
S
Ovulation is a process whereby
A.
Algae
Yeast
Guppy
Salmon
A. B. C. D.
B.
Yeast
Amoeba
Whale
Spiny anteater
C.
Amoeba
Yeast
Whale
Frog
D.
Yeast
Amoeba Amoeba
Platypus
Frog
Ova are produced and released into the uterus Ova are produced and stored in the ovaries Bleeding from vagina occurs A mature ovum is released from the ovary.
Class 8 | Level-1
5
42.
Rahul wanted to nd out how polluted water affects the survival of guppies. Which of the following setups should he use to conduct a fair test? Se t- up
43.
Type of Number Volume pond water of guppies of water (l )
a
Polluted 15 pond water
8
b c
Pond water 10 Polluted 10 sea water
5 8
d A. C.
Pond water 15 a and b only a and d only
44.
option from codes given below. Column-I
Type of aquatic plants
a.
Column - II
Plants used for
(i)
Cinnamon,
making paper b.
Duckweed Elodea Elodea
Match column-I with column-II and select the correct
Asafoetida
Plants which
(ii)
Sheesham, Sheesham, Deodar
yield timber c.
Plants which yield
(iii) Eucalyptus, Eucalyptus , Bamboo
medicines d.
Spices which are
(iv) Rauwolfa
obtained from plants
8 Duckweed b and c only c and d only
A.
(a) – (ii), (b) – (iii), (c) – (iv), (d) – (i)
B.
(a) – (iii), (b) – (ii), (c) – (iv), (d) – (i)
Read the given given statements statements and and select select the correct option.
C.
(a) – (i), (b) – (iii), (c) – (ii), (d) – (iv)
Statement 1 : The onset of reproductive maturity in a girl is marked with menopause. Statement 2 : Menarche marks the end of a woman's reproductive life. 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 and statement 2 is false. D. Both statements 1 and 2 are false.
D.
(a) – (i), (b) – (iii), (c) – (iv), (d) – (ii)
B. D.
45.
Which of the following is/are benet(s) of rainwater harvesting? A.
It increases availability of water
B.
It helps in checking the declining water table.
C.
It improves the quality of groundwater.
D.
All of these
ACHIEVERS SECTION DIRECTION (Q. 46 and 47) : Read the following passage and answer the questions.
49.
A.
Human ears can not perceive sounds of all possible frequencies of vibrations. The range of frequency that a normal human ear can generally perceive is known as the audible range for human ear. 46.
20 Hz to 2,000 Hz B. 20 Hz to 20,000 Hz D.
Sounds of of frequencies frequencies above above 20,000 20,000 Hz are known as
A. C.
B. D.
Ultrasound None of these.
D.
50.
A paper can be burnt by a lighted matchstick but a log of wood cannot be burnt. What could be the reason behind behi nd it? A. B. C. D.
6
Infrasound Audible sound
C.
2 Hz to 20,000 Hz 2 Hz to 200 Hz.
47.
48.
B.
The range of frequencies of sound that is audible for human ear is A. C.
Which of of the following statements is incorrect? incorrect?
The heat produced by matchstick is not sufcient to attain the ignition temperature of wood. Wood is a non-combustible substance. Ignition temperature of paper is higher than wood hence it can be burnt easily. Ignition temperature of wood is higher than room temperature.
A biosphere reserve is a large protected area set aside for the conservation of wildlife resources, and the traditional life of tribal people living in that area. Endemic species are those species of plants and animals that are found exclusively in a particular area and are not naturally found anywhere else. Deforestation causes an increase in concentration of carbon dioxide in environment and ultimately leads to global warming. In both national parks and wildlife sanctuaries, grazing and cultivation of land are allowed.
Ozone present in X but ozone present pres ent in Y because becau se it Z . A.
X Stratosphere
B. C. D.
Mesosphere Troposphere Stratosphere
is termed 'good ozone' is termed term ed 'bad ozone' ozon e'
Y Mesosphere
Z Produces photochemical smog Stratosphere Causes hay fever Stratosphere Causes hay fever Troposphere Produces photochemical smog
Class 8 | Level-1
SPACE FOR ROUGH WORK
Class 8 | Level-1
7
