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Question
Name the compounds of sulphur that cause air pollution. Also, state the harmful effects of sulphur compounds.
Solution
Compounds of sulphur like sulphur dioxide, sulphur trioxide and hydrogen sulphide are pollutants.
Harmful effects of oxides of sulphur:
(a) It causes headache, vomiting and even death due to respiratory failure.
(b) It destroys vegetation and weakens building materials/constructions.
(c) It mixes with smoke and fog to form smog, which is very harmful.
It is oxidised by atmospheric oxygen into sulphur trioxide (SO3) which combines with water to form sulphuric acid.
2SO2(g) + O2(g) →2SO3(g)
SO3(g) + H2O(l) → H2SO4(l)
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