AIIMS 2017 Physics Isothermal Processes Assertion Reason Question
In the following questions, a statement of assertion is given followed by a corresponding statement of reason. Assertion: Molar heat capacity cannot be defined for isothermal process. Reason: In isothermal process P⁻V versus T graph is a dot.
If both assertion and reason are true and reason is correct explanation of assertion.
If both assertion and reason are true and reason is not correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
The assertion that molar heat capacity cannot be defined for an isothermal process is true because, in an isothermal process, the temperature remains constant, leading to no heat transfer associated with temperature change, which is essential for defining heat capacity. However, the reason provided is false; while the P-V versus T graph for an isothermal process is indeed a dot (indicating constant temperature), this does not accurately explain why molar heat capacity is undefined in this context. Option A is incorrect because the reason does not correctly explain the assertion, while option C is incorrect as the reason is false, and option D is incorrect since the assertion is true.
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