Intensive Test Series

General instructions:
1. This question paper consists of 39 questions in 5 sections.
All questions are compulsory.
iii. Section A consists of 20 objective type questions carrying 1 mark each including MCQ and
Assertion-Reasoning type questions.
iv. Section B consists of 6 Very Short questions carrying 02 marks each.
v. Section C consists of 7 Short Answer type questions carrying 03 marks each.
vi. Section D consists of 3 Long Answer type questions carrying 05 marks each.
vii. Section E consists of 3 source-based/case-based units of assessment of marks each with sub-
parts.

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a4paper, margin=1in

Intensive Test Series

General instructions:

1. This question paper consists of 39 questions in 5 sections.

ii. All questions are compulsory.

iii. Section A consists of 20 objective type questions carrying 1 mark each including MCQ and
Assertion-Reasoning type questions.

iv. Section B consists of 6 Very Short questions carrying 02 marks each.

v. Section C consists of 7 Short Answer type questions carrying 03 marks each.

vi. Section D consists of 3 Long Answer type questions carrying 05 marks each.

vii. Section E consists of 3 source-based/case-based units of assessment of 4 marks each with

Section A: (1×20=20)

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MCQ:
1. A toy car released with the same initial speed will travel farthest on
(A) muddy surface
(B) polished marble surface
(C) cemented surface
(D) brick surface
2. CNG is
(A) Oxides of sulphur
(B) fuel for automobiles
(C) necessary for combustion
(D) acid rain
3. Which of the following is necessary for combustion?
(A) Oxides of sulphur
(B) CNG
(C) Oxygen
(D) Carbon monoxide
4. Acid rain is caused by
(A) Oxides of sulphur and nitrogen
(B) CNG
(C) Oxygen
(D) inflammable substance
5. Which of the following is a fuel for automobiles?
(A) Oxides of sulphur and nitrogen
(B) CNG
(C) Oxygen
(D) inflammable substance

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6. Carbon monoxide is produced by
(A) Oxides of sulphur and nitrogen
(B) CNG
(C) Oxygen
(D) incomplete combustion of coal
7. Which has a very low ignition temperature?
(A) Oxides of sulphur and nitrogen
(B) CNG
(C) Oxygen
(D) inflammable substance
8. Which gas is used in fire extinguisher?
(A) Oxides of sulphur and nitrogen
(B) CNG
(C) Oxygen
(D) Carbon dioxide
9. The part which produces female gametes is
(A) Ovary
(B) Uterus
(C) Oviduct
(D) Embryo
10. The part where development of the baby takes place is
(A) Ovary
(B) Uterus
(C) Oviduct
(D) Embryo
Assertion (A): Wildlife sanctuaries are important for conservation of plants and animals.

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Reason (R): They provide a safe and natural habitat for wildlife.
(A) Both A and R are true and R is the correct explanation of A.
(B) Both A and R are true but R is NOT the correct explanation of A.
(C) A is true but R is false.
(D) A is false but R is true.
Assertion (A): Reproduction is important for the continuation of species.
Reason (R): It ensures the creation of new individuals of the same kind.
(A) Both A and R are true and R is the correct explanation of A.
(B) Both A and R are true but R is NOT the correct explanation of A.
(C) A is true but R is false.
(D) A is false but R is true.
Assertion (A): Two blocks of iron of different masses require different forces to move them
from rest on a cemented floor.
Reason (R): The force required to overcome static friction depends on the mass of the
object.
(A) Both A and R are true and R is the correct explanation of A.
(B) Both A and R are true but R is NOT the correct explanation of A.
(C) A is true but R is false.
(D) A is false but R is true.
Assertion (A): An LED glows when liquid A is used in a conductivity experiment, but not
with liquid B.
Reason (R): Liquid A is a good conductor of electricity, while liquid B is an insulator.
(A) Both A and R are true and R is the correct explanation of A.
(B) Both A and R are true but R is NOT the correct explanation of A.
(C) A is true but R is false.
(D) A is false but R is true.
Assertion (A): Although two cells called gametes fuse, the product formed is a single cell
called zygote.

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Reason (R): Gametes are haploid cells, and the zygote is a diploid cell formed after fertil-
ization.
(A) Both A and R are true and R is the correct explanation of A.
(B) Both A and R are true but R is NOT the correct explanation of A.
(C) A is true but R is false.
(D) A is false but R is true.
16. The part through which the developing embryo passes to reach the uterus is
(A) Ovary
(B) Uterus
(C) Oviduct
(D) Embryo
17. Which of the following is not a product of petroleum refining?
(A) Petrol
(B) Diesel
(C) Kerosene
(D) Coke
18. Which of the following is a renewable source of energy?
(A) Coal
(B) Petroleum
(C) Natural gas
(D) Solar energy
19. Which part of the eye controls the amount of light entering?
(A) Cornea
(B) Iris
(C) Lens
(D) Retina
20. Which gas is mainly responsible for global warming?
(A) Oxygen
(B) Nitrogen
(C) Carbon dioxide

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 (D) Hydrogen

Section B: (2×6=12)
21. Why are wildlife sanctuaries important for conservation of plants and animals?
22. What is the importance of reproduction?
23. Although 2 cells called gametes fuse, the product formed is a single cell called zygote.
Justify.
24. Two blocks of iron of different masses are kept on a cemented floor. Which one of them
would require a larger force to move it from the rest position? Explain why.
25. Paheli set up an experiment using liquid A in the beaker. She observed that the bulb
glows. Then she replaced the liquid A by another liquid B. This time the bulb did not glow.
Explain why this happened.
26. The aluminium strips in an electroscope are replaced by plastic strips and a charged
body is brought in contact with the metal clip. What will happen? Explain.

Section C: (3×7=21)
27. Explain the importance of forests in maintaining the ecological balance.
28. Describe the process of fertilization in humans.
29. What are the harmful effects of acid rain? How can acid rain be prevented?
30. Explain the difference between renewable and non-renewable resources. Give two exam-
ples of each.
31. What is friction? Explain how friction can be both a friend and a foe.
32. Explain the role of different parts of a flower in reproduction.
33. Describe the characteristics of a good fuel.

Section D: (5×3=15)
34. a. What is deforestation? (1) b. List and explain five major consequences of deforesta-
tion. (4)
35. a. What is sound pollution? (1) b. List any four sources of sound pollution. (2) c.
Suggest three measures to limit noise pollution in residential areas. (2)
36. a. Explain the process of petroleum refining. (3) b. List any four uses of petroleum
products. (2)

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Section E: (4×3=12)
Case Based:
37. A farmer observed that his crop yield was significantly lower compared to previous
years. He consulted an agricultural expert who advised him to use nitrogen-fixing bacteria.
a. What are nitrogen-fixing bacteria? (1) b. How do these bacteria help in increasing crop
yield? (2) c. What is the importance of nitrogen for plants? (1)
Case Based:
38. A group of students visited a coal mine during their school trip. They observed the
various processes involved in coal extraction and its usage. a. What is coal? How is it
formed? (1) b. List any two uses of coal. (1) c. Explain the environmental impacts of
burning coal. (2)
Case Based:
39. During a science experiment, a student took two beakers filled with equal amounts of
water. He added sugar to one beaker and salt to the other. He then observed that the rate
of dissolving was different for both. a. What factors affect the rate of dissolving? (2) b.
How does temperature affect the solubility of a substance? (2)
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Question paper by Priyanshu Dey