Assertion :During change of state, specific heat of a substance is zero. Reason: Specific heat of a substance is directly proportional to change of heat and inversely proportional to change in temperature.

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 D Assertion is incorrect but Reason is correct
During change of state specific heat of the substance is infinity.Because $S = \frac{Q}{m Δ T}$ and $Δ T = 0$ during change of state. Specific heat of a substance is directly proportional to change of heat and inversely proportional to change of temperature is true.

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