Gases possess characteristic critical temperature which depends upon the
magnitude of intermolecular forces between the particles. Following are the
critical temperatures of some gases.
Gases H2 He O2 N2
in Kelvin 33.2 5.3 154.3 126
From the above data what would be the order of liquefaction of these gases?
Start writing the order from the gas liquefying first
(i) H2, He, O2, N2
(ii) He, O2, H2, N2
(iii) N2, O2, He, H2
(iv) O2, N2, H2, He
Option (iv) is the answer.