Assertion (A):  Enthalpy and entropy of any elementary substance in the standard states are taken as zero.
Reason (R): At absolute zero, particles of the perfectly crystalline substance become completely motionless.
 
1.  Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A)  is false and (R) is true.
Subtopic:  2nd & 3rd Law of Thermodynamics |
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