Which of the following pollutant(s) catalyse(s) the oxidation of sulphur dioxide to sulphur trioxide?

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Particulate matter

CO2

NO2

All of the above

answer is A.

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Detailed Solution

Uncatalysed oxidation of SO2 is slow. However, the presence of particulate matter in polluted air catalysed the oxidation of SO2 to SO32SO2(g)+O2(g)⟶ Particulate matter 2SO3(g)

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