42. Energy of all molecules of a monoatomic gas having a volume V and pressure P is (3/2)PV . The total translational kinetic energy of all molecules of a diatomic gas as the same volume and pressure is
(a) (1/2)PV (b) (3/2)PV
(c) (5/2)PV (d) 3PV
Answer-b
(7)