However great the pressure,a gas cannot be liquefied above its

Explain the liquefaction of $CO_2$ gas using the Thomas Andrews plot,including the effects of temperature and pressure,and define the critical constants.

What is meant by the vapor of a substance like $CO_2$?

Amongst the following statements,the correct one is

Under what conditions will an ideal gas,which follows the kinetic gas equation,undergo liquefaction?

The gas with the highest critical temperature is