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Question

Assertion :Spontaneous process is an irreversible process and may be reversed by some external agency. Reason: Decrease in enthalpy is a contributory factor for spontaneity.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
A process is spontaneous when ΔG<0.

ΔG=ΔHTΔS.

When ΔH<0, it may lead to negative value for ΔG .

A spontaneous process is an irreversible process and may be reversed by some external agency.
The decrease in enthalpy is a contributory factor for spontaneity.

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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