Assertion : All the gases should be cooled below their critical temperature for liquification .Reason : Cooling slows down the movement of molecules therefore , intermolecular forces may hold the slowly moving molecules together and the gas liquifies .

Assertion : All the gases should be cooled below their critical temper

1.	Assertion : All the gases should be cooled below their critical temperature for liquification .Reason : Cooling slows down the movement of molecules therefore , intermolecular forces may hold the slowly moving molecules together and the gas liquifies .
Answer» If both ASSERTION and reason are true and reason is the correct explanation of assertion . If both assertion and reason are true but reason is notthe correct explanation of assertion . If assertion is true but reason is false . If both assertion and reason are false . Solution :Critical temperature of a GAS is the highest temperature at which liquification of the gas FIRST occurs.Above critical temperature, gas cannot be LIQUEFIED howsoever high pressure may be APPLIED on the gas.