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Question

A cyclic process ABCD is shown in the P-V diagram for an ideal gas. Which of the following diagrams represents the same process?


A
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B
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C
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D
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Solution

The correct option is C
AB:IsobaricVT=constant.
V vs T must be a straight line through the origin. Also, since V increases, T must increase.

BC: Looks like an isothermal process. So a straight line parallel to the y axis and going upwards (as, V is increasing.)

CD: Isochoric with decrease in P and T. Hence straightline parallel to x - axis.

DA: Again isothermal and hence parallel to y - axis.

Hence, [C].

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