Chemistry - Real Gas Question with Solution | TestHub

Statements A, B, C, and D are all correct.

* Statement (A): Constant $a$ directly measures the magnitude of intermolecular attractive forces between gas molecules.

* Statement (B): Constant $b$ accounts for the finite size of molecules and is defined as the co-volume or excluded volume.

* Statement (C): From the term $(V-nb)$, the unit of $b$ must be volume divided by moles, which is $Lmo{l}^{-1}$.

* Statement (D): The critical volume is given by $V_c=3b$, which mathematically means $b=\frac{V_c}{3}$ (one-third of $V_c$).