Oxides of nitrogen and sulphur form when they react with water vapour present in the atmosphere.
A
bases
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B
salts
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C
acids
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Solution
The correct option is C acids Oxides of nitrogen and sulphur form acids when they react with water vapour present in the atmosphere. Nitrogen dioxide forms nitric acid whereas sulphur dioxide forms sulphuric acid on reaction with water vapour. This results in acid rain. This acid damages buildings and plants.