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Which one of the following gas is readily soluble in water at room temperature ?

  • A.Chlorine
  • B.Nitrogen
  • C.Ammonia
  • D.Carbon dioxide

Answer: D

Ammonia is by far the most soluble of these gases in water.

About 700 litres of ammonia dissolve in one litre of water at room temperature, because \(\mathrm{NH_3}\) hydrogen bonds to water and partly reacts with it. Carbon dioxide dissolves to less than one litre per litre, nitrogen barely at all.

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