Compressibility factor of a gas is given by the equation `Z=(PV)/(nRT)`. On this basis , mark the correct statement.

Options

A. When `Z gt 1`, real gases get compressed easily.
B. When `Z = 1`, real gases get compressed easily.
C. When `Z gt 1`, real gases are difficult to compress
D. When `Z=1` real gases are difficult to compress

Answer

C

Explanation

In case of real, `PV = nRT`, therefore `Z = 1 `
When `Z gt 1` , it is a positive deviation . It shows that the gas is less compressible expected from ideal behaviour.