States of Matter - Result Question 3-3
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.
BETA
