States of Matter 2 Question 3
3. The critical temperature of water is higher than that of $\mathrm{O}{2}$ because the $\mathrm{H}{2} \mathrm{O}$ molecule has
(1997)
(a) fewer electrons than $\mathrm{O}_{2}$
(b) two covalent bonds
(c) V-shape
(d) dipole moment
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Answer:
Correct Answer: 3. (d)
Solution:
- Critical temperature is directly proportional to intermolecular force of attraction. $\mathrm{H}{2} \mathrm{O}$ is a polar molecule, has greater intermolecular force of attraction than $\mathrm{O}{2}$, hence higher critical temperature.
