The critical temperature of water is higher than that of O2 because H2O molecule has
Fewer electrons than oxygen
Two covalent bonds
V-shape
Dipole moment
Critical temperature of water is more than O2 due to its dipole moment
(Dipole moment of water = 1.84 D; Dipole moment of O2=zero D).
It's easier to liquify oxygen than hydrogen because: a) oxygen has a higher critical temperature and lower inversion temperature than hydrogen b) oxygen has a lower critical temperature and higher inversion temperature than hydrogen c) oxygen has a higher critical temperature and higher inversion temperature than hydrogen d) the critical temperature and inversion temperature of oxygen is very low