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Question
Explain the formation of acid rain due to:
Oxides of sulphur
Solution
Oxides of sulphur:
Sulphur is a non-metallic element found in coal and fuel oil.
When these fuels are burned, sulphur combines with oxygen in the air to form its gaseous oxides, sulphur dioxide (SO2) and sulphur trioxide (SO3).
S + O2 → SO2
2SO2 + O2 → 2SO3
Sulphur dioxide and sulphur trioxide react with water to form H2SO4 which is the main cause of acid rain.
2SO2 + O2 + 2H2O →2H2SO4
SO3 + H2O →H2SO4
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