A) At absolute zero temperature, entropy of a perfectly crystalline substance is taken to be zero
B) At absolute zero of temperature the entropy of a perfectly crystalline substance is +ve
C) At absolute zero of temperature the entropy of all crystalline substance is to be zero
D) At \[{{0}^{\text{o}}}C,\] the entropy of a perfectly crystalline substance is taken to be zero
Correct Answer: A
Solution :
At absolute zero temperature, entropy of a perfectly crystalline substance is taken to be zero. It is called third law of thermodynamics.
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