Humus is formed by: MCQ with Answer and Explanation

Humus is formed by:

A. Rock weathering

B. Decomposition of organic matter

C. Volcanic activity

D. River deposition

Answer: Option B

Humus is the dark organic component formed from decomposed plant and animal remains.

This question belongs to: Geography GK Soils of India

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Question #1 Report Error

Which soil is richest in potassium among Indian soils?

A. Laterite soil

B. Black soil

C. Alluvial soil

D. Desert soil

Correct Answer: Option C

Explanation:
Alluvial soil is generally rich in potash (potassium).

This question belongs to: Geography GK Soils of India

Question #2 Report Error

Which soil is also called 'brick soil'?

A. Laterite soil

B. Red soil

C. Alluvial soil

D. Black soil

Correct Answer: Option A

Explanation:
Laterite soil hardens like bricks after drying due to iron and aluminum content.

This question belongs to: Geography GK Soils of India

Question #3 Report Error

Which soil is rich in soluble salts in arid regions?

A. Red soil

B. Black soil

C. Mountain soil

D. Desert soil

Correct Answer: Option D

Explanation:
Desert soils often accumulate soluble salts due to high evaporation.

This question belongs to: Geography GK Soils of India