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Question
Starting from nitrogen in air, enlist the reactions with the help of balanced equations, which result in the conversion of nitrogen in an internal combustion- engine, to the acids formed which are responsible for acid rain.
Solution
In the internal combustion engine atmospheric air containing 80% N2 is used for combustion of fossil fuel.
At high temp. N2 + O2 → 2NO .
NO is released into air of atmosphere where it forms N02 in presence of lightning discharge.
2NO + 02 → 2NO2
N02 when comes in contact with water vapours to form nitric acid and falls in the form of acid rain
2N02 + H20 →HNO3 + HNO2
2H20 + 4NO2 + 02 → 4HNO3
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