The curve of pressure volume (PV) against pressure (P) of the gas at a particular temperature is as shown, according to the graph which of the following is/are incorrect (in low pressure region):

Options

A. `H_2` and He show positive deviation from ideal gas equation
B. CO, `CH_4` and `O_2` show negative deviation from ideal gas equation
C. `H_2` and He show negative deviation while `CO_2,CH_4` and `O_2` show positive deviation
D. `H_2` and He are less compressible than that of an ideal gas while `CO_2, CH_4` and `O_2` more compressible than that of ideal gas.

Answer

C

Explanation

if `Zgt1` positive deviation
`Zlt1` negative deviation