Assertion :Straight line on $P - T$ graph for an ideal gas represents isochoric process. Reason: If $P \propto T$ , $V = c o n s t a n t .$

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
In an isochoric process, $V α \frac{T}{P} = c o n s t a n t$ , Hence reason is definitely correct. But a straight line on P-T graph cannot guarantee an isochoric process since that need not necessarily pass from origin which must be true for process to be isochoric.

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Assertion :Straight line on P−T graph for an ideal gas represents isochoric process. Reason: If P∝T , V=constant.

Assertion :Straight line on $P - T$ graph for an ideal gas represents isochoric process. Reason: If $P \propto T$ , $V = c o n s t a n t .$