Question

The critical temperature of water is higher than that of $O_2$ because the $H_{2}O$ molecule has:

• A. fewer electrons than $O_2$
• B. two covalent bonds
• C. $V$-shape
• D. dipole moment

Answer 1

The correct option is D dipole moment

Higher are the intermolecular forces of attraction, higher will be the critical temperature.
Water is a polar molecule and has dipole moment. Strong dipole-dipole interaction are present in between water molecules.
Oxygen do not have dipole moment.
Hence the critical temperature of water is higher than that of oxygen.