The gas with the highest critical temperature is

Amongst the following statements,the correct one is

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

The liquified gas that is used in dry cleaning along with a suitable detergent is

Under what conditions can an ideal gas,which follows the kinetic gas equation,be liquefied?

Gases can be liquefied by: