Multiple choice

Water is a liquid, while hydrogen sulphide is a gas at room temperature. The reason is

  1. that the size of oxygen is smaller than that of sulphur

  2. that sulphur can expand its valency

  3. the anomalous behaviour of oxygen

  4. the tendency of water molecules to form hydrogen bonds
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Water is a liquid, while hydrogen sulphide is a gas at room temperature because water molecules have the tendency to form hydrogen bonds. Due to hydrogen bonding, the force of attraction becomes stronger, but there is no hydrogen bonding in H2S.

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