Which one of the following statements about the properties of real and ideal gases is correct?
a-At high pressures, the finite size of the molecules causes the total volume of a real gas to be greater than the free volume of the real gas.
b-At low temperatures, the repulsive forces between molecules cause a real gas to deviate from ideal gas behavior. The ratio PV/RT = 0.08206 L atm mol-1 K-1 for one mole of an ideal gas.
c-The ratio PV/RT is less than 1 for 1 moles of a real gas because of repulsive interactions between the molecules.
d-The ratio PV/RT is less than 1 for 1 mole of a real gas at high pressure.