The correct statement regarding entropy is:

Options

A. At absolute zero temperature, entropy of a perfectly crystalline solid is zero
B. At absolute zero temperature, the entropy of a perfectly crystalline substance is +ve
C. At absolute zero temperature, the entropy of all crystalline substances is zero
D. At `0^(@)C` the entropy of a perfectly crystalline solid is zero.

Answer

A

Explanation

Entropy of perfectly crystalline solids will be zero at absolute zero. It is predicted in the third law of thermodynamics.