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

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Which gas is the most abundant in the Earth's atmosphere?

A. Nitrogen

B. Oxygen

C. Argon

D. Carbon Dioxide

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%.

This question belongs to: Geography GK Climate and Weather

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Question #1

Which of the following is a secondary pollutant?

A. Ozone

B. Sulfur dioxide

C. Carbon monoxide

D. Nitrogen oxides

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Correct Answer: Option A

Explanation:
Ozone is a secondary pollutant, meaning it is not emitted directly but is formed in the atmosphere through chemical reactions between primary pollutants (like nitrogen oxides and volatile organic compounds) in the presence of sunlight.

This question belongs to: Geography GK Climate and Weather

Question #2

Which region receives the highest average annual rainfall in the world?

A. Mawsynram, India

B. Congo Basin

C. Southeast Asia

D. Amazon Basin

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Correct Answer: Option A

Explanation:
Mawsynram, in Meghalaya, India, holds the record for the highest average annual rainfall, receiving over 11,000 mm annually.

This question belongs to: Geography GK Climate and Weather

Question #3

Vembanad Lake is located in which state?

A. Tamil Nadu

B. Andhra Pradesh

C. Kerala

D. Karnataka

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Correct Answer: Option C

Explanation:
Vembanad Lake is located in Kerala and is the longest lake in India, famous for its houseboats and backwaters.

This question belongs to: Geography GK Climate and Weather

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