Assertion (A) Gases do not liquefy above their critical temperature even on applying high pressure, Reason (R) Above critical temperature, the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape due to of high speed.

Both A and B are true and R is the correct explanation of A gases do not liquefy above their critical temperature even on applying high pressure because above this temperature, the molecular speed is high and intermolecular attractions cannot hold the molecules together. They escape due to high speed.