The coldest layer of the atmosphere is: MCQ with Answer and Explanation

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The coldest layer of the atmosphere is:

A. Thermosphere

B. Stratosphere

C. Troposphere

D. Mesosphere

Answer: Option D

Solution (By JKExamLibrary)

The mesosphere is the coldest atmospheric layer, with temperatures reaching around -90°C.

This question belongs to: Geography GK Physical Geography

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The term 'albedo' refers to:

A. Reflectivity of a Surface

B. Ocean Depth

C. Wind Speed

D. Humidity Level

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Correct Answer: Option A

Explanation:
Albedo is the proportion of incoming solar radiation reflected by a surface.

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Question #2

Which lake is the largest freshwater lake by surface area?

A. Lake Tanganyika

B. Lake Victoria

C. Lake Baikal

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Correct Answer: Option D

Explanation:
Lake Superior is the largest freshwater lake in the world by surface area.

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Question #3

Which mineral is the principal ore of zinc?

A. Magnetite

B. Galena

C. Sphalerite

D. Chromite

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Correct Answer: Option C

Explanation:
Sphalerite (ZnS) is the most important ore of zinc and is widely mined across the world.

This question belongs to: Geography GK Physical Geography

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