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Question

Which of the following represents van der Waals gas below the critical temperature?

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
Van der Waal's equation is
(P+aV2)(Vb)=RT (for one mole of the gas)

Below the Tc (critical temperature) for certain value of pressure van der Waals equation gives three roots of volume as equation is cubic function of V.
Hence, the correct answer is option (c).

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