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

Step-by-step solution

Here the given equation is P ( V - b ) = RT . On comparing with van der Waals' equation P + a V 2 [ V - b ] = R T That is a = 0 . It means only repulsive forces are present which are contributive only at very close distance so the potential energy will increase abruptly. i.e., graph C is correct.