SAMPLE PAPER FOR NATIONAL SCIENCE OLYMPIAD (NSO)STAGE-II CLASS -VII
Time : 1 Hr.
Max. Marks : 50
GENERAL INSTRUCTIONS 1. The booklet given in the examination hall will be the Question Paper. An OMR Answer Sheet will also be provided along with the Question Paper. 2. A candidate has to write his/her answers in the OMR sheet by darkening the appropriate bubble with the help of HB Pencil as the correct answer(s) of the question attempted. 3. Paper carries 50 questions. There are 2 sections, 15 in Section I and 35 in Section II. 4. Blank papers, clip boards, log tables, slide rule, calculators, mobile or any other electronic gadgets in any form is not allowed. 5. Write your Name & Roll No. in the space provided in the bottom of this booklet. 6. Before answering the paper, fill up the required details in the blank space provided in the answer sheet. 7. There is no negative marking. Do not spend too much time on a particular question. 8. No rough sheets will be provided by the invigilators. All the rough work is to be done in the blank space provided in the question paper. 9. In case of any dispute, the answer filled in the OMR sheet available with the institute shall be final.
Name : ____________________________________________ Roll No. : _______________________________
MENTAL ABILITY 1.
The simplification of
7
1 1 1 1 1 1 1 – 2 4 1 4 2 1 2 3 6 yields. 2
(A) 2.
2 9
Given that
(B) 4
(C) 9
4096 = 64, the value of
(A) 70.4 3.
1 2
4096 +
(B) 70.464
1 2
40.96 +
(D) 1
77 228
0.004096 is equal to ?
(C) 71.104
(D) 71.4
The average age of 7 members of a family is 18 years. If the head of the family is excluded the average age of the rest of the members would be 5 years less. Find the age of the head of the family. (A) 78 yrs.
4.
(C) 13 yrs.
(D) 126 yrs.
(C) 337/6
(D) None of these
Simplify (94/3 272/3) × 33/2 (A) 39/5
5.
(B) 48 yrs.
(B) 313/6
The salary of a workman for the year 1987 was Rs. 8800. This is 10% more than his salary in 1986 what was his salary in 1986 ? (A) Rs. 7920
6.
(B) Rs.8000
(C) Rs. 9680
(D) Rs.7800
Subtract 2x3 + x2 – 4x – 1 from 5x3 + 5x2 + 9 (A) 3x3 + 4x2 + 4x + 10 (B) 3x3 + 4x2 + 4x – 10 (C) 3x3 – 4x2 + 4x – 10 (D) None of these
7.
An angle is five times its complement. What is the measure of the angle ? (A) 15º
(B) 75º
(C) 30º
(D) 150º
(Space For Rough Work)
NSO _CLASS-VII_PAGE # 1
8.
The diagram given along side shows two paths drawn inside a rectangular field 50 metres long and 35 metres wide. The width of each path is 5 metres. Find the area of the shaded portion.
(A) 400 m2 (B) 250 m2 Directions : (9 to 10) Find the missing numbers : 9. 6, 11, 18, 27, 38, ?, 66 (A) 58 (B) 54
10.
6 9 10
8 3 14
(C) 175 m2
(D) 425 m2
(C) 51
(D) 59
(C) 7
(D) 5
? 13 1
(A) 11
(B) 9
11.
If CARPET is coded as TCEAPR, then the code for NATIONAL would be:(A) NLATNOIA (B) LANOITAN (C) LNAANTOI (D) LNOINTAA
12.
How many such 6's are there in the following number series which are followed by an even number and preceded by any odd number ? 364576354364564163963456 (A) zero (B) One (C) Two (D) Three
13.
If means +, – means ,× means – and + means ×, then
32 8 8 2 =? 4 18 8 9 1 (A) 0
(B) 1
(C) 12
(D) None of these
14.
Rakesh Started from his house, walked 4 km towards East, then 3 km towards North then 6 km towards South. How far away from his house was he then ? (A) 2 kms (B) 3 kms (C) 4 kms (D) 5 kms
15.
Count the number of triangles in the following figure.
(A) 8
(B) 10
(C) 12 (Space For Rough Work)
(D) 14
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SCIENCE 16.
17.
Light shows : (A) Random propagation
(B) Curvilinear propagation
(C) Rectilinear propagation
(D) None of these
Umbra and penumbra are clearly visible when : (A) The source of light is big and the obstructing object is small (B) The source of light is small and the obstructing object is big (C) Both source of light and the obstructing object are big (D) Both source of light and the obstructing object are small
18.
For a concave mirror when the object is placed between the pole and the focus then the image formed will be : (A) Virtual
19.
(A) metre 20.
(C) metre/second
(D) second
(B) 278, 41
(C) 41, 278
(D) –23, 278
(B) 1000 cal
(C) 100 cal
(D) zero
(B) 600 km
(C) 10 km
(D) 7 km
A car accelerates uniformly from 18 km/h to 36km/h in 5 sec. The acceleration in ms–2 is : (A) 1
24.
(B) Hertz
In 10 minutes, a car with speed of 60 kmh-1 travels a distance of : (A) 6 km
23.
(D) Diminished
The quantity of heat required to raise the temperature of 250 g of water from 10ºC to 50ºC is : (A) 10,000 cal
22.
(C) Inverted
The value of 5ºC in ºF and K scale will be respectively : (A) 41, 279
21.
(B) Real
The unit of that quantity on which loudness of sound depends is :
(B) 2
(C) 3
(D) 4
Electric bell works on the principle of : (A) chemical effect of current
(B) magnetic effect of current
(C) heating effect of current
(D) all of the above
(Space For Rough Work)
NSO _CLASS-VII_PAGE # 3
25.
When the path of current, starting from one terminal of cell, ends at the other terminal of the cell is broken at some point, then such a circuit is called :
26.
(A) closed circuit
(B) open circuit
(C) either (A) or (B)
(D) None of these
Sound waves cannot pass through : (A) A solid liquid mixture (B) A liquid gas mixture (C) An ideal gas
27.
The heat energy emitted by sun reaches the earth through : (A) conduction
28.
35.
(D) NaOH
(iv) Breaking of a glass pane (B) (iii) only
(C) (ii) and (iii) only
(D) (i) to (iv) all
(B) chemical change
(C) redox reaction
(D) None of these
(B) slightly alkaline
(C) oxygen free
(D) completely neutral
Dissolving sugar in water is an example of -
Pure water is -
Global warming is caused, when air has excess of (B) water
(C) carbon dioxide
(D) nitrogen dioxide
The number of electrons in an atom of an element with atomic number X and mass number Y will be (A) X – Y
34.
(C) H2SO4
(iii) Clotting of blood
(A) oxygen 33.
(B) CH3COOH
(ii) Freezing of water
(A) slightly acidic 32.
(D) None of these
(i) Crystallisation of sugar from its solution
(A) physical change 31.
(C) radiation
Which of the following is/are an example (s) of chemical change ?
(A) (i) and (ii) only 30.
(B) convection
Which of the following is known as the king of chemicals ? (A) HCl
29.
(D) A perfect vacuum
(B) Y – X
(C) X + Y
(D) X
Aqua regia is a mixture of (A) H2SO4 and HCl
(B) HNO3 and H2SO4
(C) HCl and HNO3
(D) HCl, HNO3 and H2SO4
A person having acidity disorder should be given (A) sodium hydroxide
(B) milk of magnesia
(C) common salt
(D) lemon juice
(Space For Rough Work)
NSO _CLASS-VII_PAGE # 4
36.
37.
The chemical name of marble is (A) calcium carbonate
(B) magnesium carbonate
(C) calcium chloride
(D) calcium sulphate
Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it as shown in the figure.
Test tube
Spatula containing sulphur powder Burner
What will be the action of gas on moist blue litmus paper ? (A) Blue litmus paper will be changed into green litmus. (B) Blue litmus paper will be changed into red litmus. (C) No change in the colour of litmus paper. (D) Both (A) and (B) 38.
Which of the following are chemical changes ? (i) Digestion of food (ii) Liquefaction of air (iii) Ripening of fruit (iv) Dissolution of sulphur in carbon disulphide (v) Freezing of water (vi) Electrolysis of water (A) (i) to (vi) all
39.
(C) (i), (iii) & (vi)
(D) (iii), (iv) & (vi)
Solutions (A) and (B) have pH 5 and 10 respectively. Which one of these solutions is alkaline ? (A) B
40.
(B) (i), (iii) & (v)
(B) A
(C) Both
(D) None of these
(C) fructose
(D) cellulose
The cell wall of plant cells is made up of (A) starch
(B) glucose
(Space For Rough Work)
NSO _CLASS-VII_PAGE # 5
41.
42.
In glycolysis the end product is (A) phosphoglyceric acid
(B) citric acid
(C) pyruvic acid
(D) glucose
Green plants manufacture their food by (A) Respiration
43.
(B) Photosensitization
(B) haemoglobin
(B) Liver
(B) spleen
(B) 46
49.
(B) genus
(C) liver
(D) brain
(C) 48
(D) 50
(C) family
(D) phylum
A Fossil is a (A) Laboratory preserved animal
(B) Dead animal of the past
(C) Organic, relic of the past
(D) Living animal
Phycology is (A) Study of algae
50.
(D) Thyroid
Basic unit of classification is (A) species
48.
(C) Red bone marrow
The number of chromosomes in human cell is (A) 44
47.
(D) lymph
Ammonia is converted into urea in (A) heart
46.
(C) CO2
Where are red blood cells formed ? (A) Spleen
45.
(D) Osmosis
Oxygen is transported in the blood of human beings by (A) plasma
44.
(C) Photosynthesis
(B) study of fungi
(C) Study of bacteria
(D) Study of virus
(C) monosomes
(D) karyosome
Sex chromosomes are also called as (A) autosomes
(B) allosomes
(Space For Rough Work) Q u e s.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Ans
B
B
B
B
B
A
B
A
C
A
C
D
B
D
C
Q u e s.
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Ans
C
A
A
A
C
A
C
A
B
B
D
C
C
B
A
Q u e s.
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
Ans
D
C
D
C
B
A
B
C
A
D
C
C
B
C
C
Q u e s.
46
47
48
49
50
Ans
B
A
C
A
B
NSO _CLASS-VII_PAGE # 6