At a given temperature and pressure, 1 mol of an ideal gas occupies a volum eof 20.8 L for 1 mol of a real gas at the same temperature and pressure-
(i) Z will be equal to 1 if the volume of the real gas is
(ii) Z will be greater than 1 if the volume of the real gas is
(iii) Z will be less than 1 if the volume of the real gas is.

Explanation

`Z=(V)/(V_(1))`, where `V_(i)`=the volume of a certain amount of an ideal gas at a given temperature and pressure and V=the volume of the same amount of a real gas at the same temperature and pressure.
As given, `V_(i)`=20.8L.
Therefore, if (i) V=20.8L, then Z will be equal to 1
(ii) `V gt 20.8L`, then Z will be greater than 1.
(iii) `V lt 20.8L`, then Z will be less than 1.