(A) CO2 gas at low pressure and at temp 573K obeys the idela gas law PV = nRT.
It is more compressible than that of ideal gas.
It can not be liquified at any pressure.
Its Molar volume is lower than that of ideal<br><br>gas at same pressure and temperature.
(B) H2 gas at (P~0, 273K) is more compressible than that of ideal gas.
(C) CO2 gas in very high pressure region & temperature 623 K.
It can not be liquefied at any pressure.
(D) CH4 gas at 333K & in low pressure region is more compressible than that of ideal gas.