Question

Assertion : When a glass of hot milk is placed in a room and allowed to cool, its entropy decreases.

Reason : Allowing hot object to cool does not violate the second law of thermodynamics.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

Correct option (b) Both A and R are true but R is not correct explanation of A

Explanation :

Assertion is true. Due to cooling of milk, disorder decreases. Hence entropy decreases. Reason does not explain the assertion though it is true in itself.