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False statement regarding second law of thermodynamics

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Heat cannot flow from a colder body to a hotter body on its own

All spontaneous processes are thermodynamically irreversible and entropy of the universe increases in all spontaneous processes.

It is impossible to construct a machine working in cycles which transforms heat from a lower temperature region to higher temperature region without intervention of any external agency.

Any spontaneous process taking place in isolated system, $∆$ S<O

answer is C.

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Detailed Solution

For all isolated spontaneous process

$∆ S_{total}$ = $∆ S_{sys} + ∆ S_{surr} > 0$

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