#### 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 incorrect (in the low pressure region): Option 1)  H2 and He shows +ve deviation from ideal gas equation. Option 2)  CO, CH4 and O2 show negative deviation from ideal gas equation. Option 3)  H2 and He show negative deviation while CO, CH4 and O2 show positive deviation. Option 4)  H2 and He are less compressible than that of an ideal gas while CO, CH4 and O2 more compressible than that of ideal gas.

As we learnt in

Compressibility Factor -

for hydrogen and helium, Z is  greater than 1 even at low pressures.

-

Option 1)

H2 and He shows +ve deviation from ideal gas equation.

Incorrect

Option 2)

CO, CH4 and O2 show negative deviation from ideal gas equation.

Incorrect

Option 3)

H2 and He show negative deviation while CO, CH4 and O2 show positive deviation.

Correct

Option 4)

H2 and He are less compressible than that of an ideal gas while CO, CH4 and O2 more compressible than that of ideal gas.

Incorrect