T C ( A ) > T C ( B ) > T C ( C ) assuming identical value of b ′ . Which gas can be most easily liquefied? Options: A B C All at same temperature Solution: Relation used T C = 8 a 27 R b where, a and b are van der Waals' constant. Keeping value of b constant, we have, T C ∝ a As we know, more be the value of ' a ′ , more easily we can liquefy the gas. Hence, more be the value of T C ,more easily that gas will be liquefied i.e. A" >