Which atmospheric gas is most important for respiration? MCQ with Answer and Explanation

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Which atmospheric gas is most important for respiration?

A. Neon

B. Oxygen

C. Carbon Dioxide

D. Nitrogen

Answer: Option B

Solution (By JKSSB Mock Tests)

Oxygen is essential for respiration in humans and most living organisms.

This question belongs to: Geography GK Physical Geography

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Practice More Physical Geography Questions

Question #1

Which coastal feature is formed by deposition?

A. Sea Cave

B. Wave-cut Platform

C. Cliff

D. Beach

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Correct Answer: Option D

Explanation:
Beaches form through the deposition of sand, gravel, and pebbles by waves.

This question belongs to: Geography GK Physical Geography

Question #2

Which phenomenon explains red sunsets?

A. Reflection

B. Refraction

C. Scattering of longer wavelengths

D. Condensation

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Correct Answer: Option C

Explanation:
At sunset, blue light is scattered away, leaving red and orange wavelengths visible.

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Question #3

An esker is formed by:

A. Sub-glacial streams

B. River deposition

C. Sea waves

D. Wind erosion

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Correct Answer: Option A

Explanation:
Eskers are long winding ridges formed by sediments deposited by streams flowing beneath glaciers.

This question belongs to: Geography GK Physical Geography

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