IIT-JEE 2008 · Paper 2 · Chemistry Q57

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ChemistryAssertion and reason+3 / -1Question 57 of 66

STATEMENT-1: There is a natural asymmetry between converting work to heat and converting heat to work.

and

STATEMENT-2: No process is possible in which the sole result is the absorption of heat from a reservoir and its complete conversion into work.

STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is a correct explanation for STATEMENT-1

STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1

STATEMENT-1 is True, STATEMENT-2 is False

STATEMENT-1 is False, STATEMENT-2 is True

Answer and worked solution

Official answer: A

Statement 2 is the Kelvin-Planck statement of the second law. True.

Statement 1. Work can be converted completely into heat (e.g. by friction), but heat cannot be converted completely into work in a cycle. That asymmetry is exactly what the second law states. True, and explained by Statement 2.

(A)

Topics:Entropy

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IIT-JEE 2008 · Paper 2, Chemistry question 57