Q. In van der Waals’ equation of state of the gas law, the constant $'b^{'}$ is a measure of
A) Intermolecular repulsions
B) Intermolecular attraction
C) Volume occupied by the molecules
D) Intermolecular collisions per unit volume
Explanation
(c)
van der Waals’ equation for one mole of a gas is
$\left\lbrack p + \frac{a}{V^{2}} \right\rbrack\ \lbrack V - b\rbrack = RT$
Where, $b$ is volume correction. It arises due to effective size of molecules.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.