Q. Study the following statements regarding second law of thermodynamics.
I. Kelvin and Planck's statements deny the possibility of a perfect refrigerator or heat pump.
II. Clausius statement denys the possibility of a perfect heat engine.
Choose the correct statement.

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Solution:

Kelvin and Planck's statements deny the possibility of perfect heat engine and Clausius statement denys the possibility of perfect refrigerator.
Kelvin-Planck statement No process is possible whose sole result is absorption of heat from a reservoir and the complete conversion of the heat into work.
Clausius statement No process is possible whose sole result is the transfer of heat from a colder object to a hotter object.
So, neither statement I nor II is correct.