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Question

Choose the correct option

Assertion (A): Black soils have swelling and shrinking characteristics

Reason(R): Black soils are rich in montmorillonite which has tendency to swell when wet and shrink when dry.

A Both A and R are true and R is the correct explanation of A. Correct Answer Incorrect Answer
B Both A and R are true, but R is not the correct explanation of A. Correct Answer Incorrect Answer
C A is true, but R is false Correct Answer Incorrect Answer
D A is false, but R is true. Correct Answer Incorrect Answer

Solution

Black soils are rich in montmorillonite (2:1 type clay mineral) which has tendency to swell when wet and shrink when dry.

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