Which gas is the most abundant in the Earth's atmosphere? MCQ with Answer and Explanation

Which gas is the most abundant in the Earth's atmosphere?
A. Nitrogen
B. Carbon Dioxide
C. Oxygen
D. Argon
Answer: Option A
Solution (By JKSSB Mock Tests)
Nitrogen makes up about 78% of the Earth's atmosphere. Oxygen is second at about 21%, and Argon is about 0.93%.

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Practice More Climate and Weather Questions

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The term 'Nor'wester' is used for thunderstorms in:
A. West Bengal
B. Tamil Nadu
C. Gujarat
D. Rajasthan

Correct Answer: Option A


Explanation:
Nor'westers are violent thunderstorms that occur in West Bengal and Assam during the pre-monsoon season (April-May).

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Question #2
What is the name of the phenomenon where air rises due to heating?
A. Advection
B. Subsidence
C. Convection
D. Conduction

Correct Answer: Option C


Explanation:
Convection is the vertical movement of air caused by heating, where warmer, less dense air rises, and cooler, denser air sinks. This is a key mechanism in weather formation.

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Question #3
What is the name of the local wind in the Mediterranean that brings heavy snowfall to the mountains?
A. Sirocco
B. Garbin
C. Mistral
D. Bora

Correct Answer: Option D


Explanation:
The Bora is a cold, dry wind that blows from the mountains of the Adriatic Sea, bringing cold air and often heavy snowfall.

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