Assertion: The compressibility factor for `H_(2)` and `He` is
`[1+(bP)/(RT)]`
Reason: The compressibility factor `H_(2)` and `He` can be derived from van der Waal's equation.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If assertion is false but reason is true.

Answer

B

Explanation

`[P+(a)/(V^(2))] [V-b]=RT`, for `H_(2)` and `He`, a very small because of low molar mass. Thus, `P_(V)=R_(T)+P_(b). Now Z=(PV)/(RT)=[1+(Pb)/(RT)]`