Statement 1: The compressibility factor less than one is due to the van der Waals' constant a of a real gas. Statement 2: The compressibility factor less than one is due to excluded volume of the gas.

JEE Main Chemistry question

Statement 1: The compressibility factor less than one is due to the van der Waals' constant of a real gas. Statement 2: The compressibility factor less than one is due to excluded volume of the gas.

(A)Assertion is True, Reason is True; Reason is correct explanation for Assertion
(B)Assertion is True, Reason is True; Reason is not correct explanation for Assertion
(C)Assertion is True, Reason is FalseCorrect
(D)Assertion is False, Reason is True

Answer: (C)

Solution

At low pressure, the van der Waals' equation reduces to , which is less than 1, showing that a compressibility factor below one is caused specifically by the attractive-force constant — so Statement 1 is true. Statement 2 is

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Question ID VK-134155