Identify the correct statement regarding entropy:

1. At absolute zero of temperature, the entropy of all crystalline substances is taken to be zero.
2. At absolute zero of temperature, the entropy of a perfectly crystalline substance is positive.
3. At absolute zero of temperature, the entropy of a perfectly crystalline substance is taken to be zero.
4. At 0 °C , the entropy of a perfectly crystalline substance is taken to be zero.
Subtopic:  2nd & 3rd Law of Thermodynamics |
 70%
Level 2: 60%+
AIPMT - 1998
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