BoardBiology

Our Environment

11 Board Biology previous year questions on Our Environment — options free on every question; 1 include the answer & explanation free, the rest unlock with PYQ Pass.

Q1 FREE PREVIEW
PYQ

Which of the following is a renewable resource?

a

Coal

b

Forest

c

Petroleum

d

None of these

✓ Correct answer: b)

Forest

Explanation

Correct Answer: B — Forest ✅

Explanation:
Renewable resources are those that can be replenished naturally.

Forest can regenerate if managed properly.

Coal and petroleum are non-renewable resources.

Q2
PYQ

Which among the following is a non-biodegradable material ?

a

Paper

b

Sewage

c

Wood

d

DDT

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Q3
PYQ

Which of the following constitutes a food chain?

a

Grass, Wheat and Mango

b

Grass, Goat and Human

c

Goat, Cow and Elephant

d

Grass, Fish and Goat

🔒
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Q4
PYQ

The chemical showing biomagnification is

a

CFC

b

DDT

c

NADP

d

ATP

🔒
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Q5
PYQ

Which forms the first trophic level in food chain ?

a

Producers

b

Secondary consumers

c

Primary consumers

d

Tertiary consumers

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Q6
PYQ

Which of the following is the main component of biogas?

a

Carbon dioxide

b

Hydrogen sulphide

c

Water vapour

d

Methane

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Q7
PYQ

The chemical which shows biomagnification is

a

CFC

b

ADP

c

ATP

d

DDT

🔒
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Q8
PYQ

Primary consumers are called

a

Decomposer

b

Omnivorous

c

Carnivorous

d

Vegetarian

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Q9
PYQ

What is the percentage of CO2 in the atmosphere ?

a

0.3 %

b

0.03 %

c

0.003 %

d

0.0003 %

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Q10
PYQ

CFC is widely used in

a

Jet engines

b

Refrigerators

c

Air conditioners

d

All of these

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Q11
PYQ

The main component of domestic gas (LPG) is

a

Ethane

b

Propane

c

Butane

d

Methane

🔒
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