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Questions  >>  JEEMAIN and NEET  >>  Physics  >>  Class11  >>  Thermodynamics
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Identify correct statement regarding spontaneous process

$\begin {array} {1 1} (A)\;\text{For a spontaneous process in an isolated system,the change in entropy is positive.} \\ (B)\;\text{Endothermic processes are never spontaneous} \\ (C)\;\text{Exothermic processes are always spontaneous.}\\ (D)\;\text{Lowering of energy in the reaction process is the only criterion for spontaneity.} \end {array}$

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A)
In an isolated system, where either mass or energy are not exchanged with the surrounding for the spontaneous process, the change in entropy is positive.
Ans : (A)
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