Question

Assertion :The gases show ideal behaviour when the volume occupied is large so that the volume of the molecules can be neglected in comparison to it. Reason: The behaviour of the gas becomes more ideal when pressure is very low.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

For $1$ mole of real gas, $(P+\frac{a}{V^2})(V-b)=RT$
when $V$ is very large, the terms $b$ and $a/V^2$ are negligible and the van der Waals equation becomes ideal gas equation,
$PV=RT$
hence, real gases behave like ideal gas.