Assertion :There is a natural asymmetry between converting work to heat and converting heat to work. Reason: No process is possible in which the sole result is the absorption of heat from a reservoir and its complete conversion into work.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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

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Assertion is correct but Reason is incorrect.

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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Statement represents II law of thermodynamics which is an reason for statement I.
Work can be completely converted into work but it's not true other way around. Heat can't be converted into work without any other effects on the system which is not the case when it's other way around.

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Q. In each of the following question, an Assertion (A) is followed by a corresponding Reason (R). Use the following keys to choose the appropriate answer:

Assertion (A): There is a natural asymmetry between converting work to heat and converting heat to work.
Reason (R): No process is possible in which the sole result is the absorption of heat from a reservoir and its complete conversion into work.

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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