Oxidation of sulphur dioxide into sulphur trioxide in the absence of a catalyst is a slow process but this oxidation occurs easily in the atmosphere. Explain how does this happen. Give chemical reactions for the conversion of SO_2 into SO_3

Oxidation of sulphur dioxide into sulphur trioxide in the absence of a

1.	Oxidation of sulphur dioxide into sulphur trioxide in the absence of a catalyst is a slow process but this oxidation occurs easily in the atmosphere. Explain how does this happen. Give chemical reactions for the conversion of SO_2 into SO_3
Answer» SOLUTION :The presence of particulates in the air CATALYSES OXIDATION of `SO_2` to `SO_3` (`2 SO_2+ O_2 overset"Particulates " to 2SO_3`)