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Question
According to Kelvin-Planck's statement of second law of thermodynamics,
Options:
A .  it is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
B .  it is possible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
C .  it is impossible to construct a device which operates in a cyclic process and produces no effect other than the transfer of heat from a cold body to a hot body
D .  none of the above
Answer: Option A
Answer: (a).it is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work

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