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5. Thermodynamics and thermochemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry5. Thermodynamics and thermochemistry1 Mark
MCQ
Identify the correct statement regarding entropy
  • A
    At ${0\,^o}C$, the 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 substances is taken to be zero
  • ✓
    At absolute zero of temperature, the entropy of a perfectly crystalline substance is taken to be zero
✓

Answer

Correct option: D.
At absolute zero of temperature, the entropy of a perfectly crystalline substance is taken to be zero
(d)This is the statement of third law of thermodynamics.

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