Chemistry 9701 · AS & A Level · 2.1

2.1 — practice question

The boiling point of water, $\mathrm{H_2O}$, is higher than the boiling point of hydrogen sulfide, $\mathrm{H_2S}$. Which statement accounts for this difference in boiling points?

  • AThe bond energy of O-H is greater than the bond energy of S-H.
  • BThe intermolecular forces in $\mathrm{H_2O}$ are weaker than the intermolecular forces in $\mathrm{H_2S}$.
  • CThe S-H bond in $\mathrm{H_2S}$ is longer than the O-H bond in $\mathrm{H_2O}$.
  • DThere is significant intermolecular hydrogen bonding in $\mathrm{H_2O}$ but not in $\mathrm{H_2S}$.

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