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(C) The given equation is $p(V-b) = RT$. This is a simplified form of the van der Waals equation where the attractive force constant $a$ is assumed to

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(C) The given equation is $p(V-b) = RT$. This is a simplified form of the van der Waals equation where the attractive force constant $a$ is assumed to be $0$ $(a = 0)$.This implies that there are no long-range attractive forces between the gas particles.However,the constant $b$ represents the excluded volume,which accounts for the finite size of the gas particles and the short-range repulsive forces.For $r For $r \geq d$,since $a = 0$,there is no attraction,so the potential energy $V(r)$ remains $0$.This corresponds to a hard-sphere potential model,which is represented by a graph that is $0$ for $r > d$ and rises vertically to infinity at $r = d$.

One mole of a monoatomic real gas satisfies the equation $p(V-b)=RT$ where $b$ is a constant. The relationship of interatomic potential $V(r)$ and interatomic distance $r$ for the gas is given by

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