MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryGaseous stateLiquefaction of Gases

The critical temperature of water is higher than that of O2 because the H2O molecule has

A.fewer electrons than O2 (b) two covalent bonds

C.V-shape

D.dipole moment✓ Correct

Explanation

The critical temperature depends upon the intermolecular forces of attraction. In water there is a permanent dipole moment therefore H- bonding is present. But in oxygen there is no permanent dipole and consequently weak forces of attraction. Therefore, water has high value of critical temperature than oxygen.

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