Sulphur dioxide acts as an oxidizing agent as well as a reducing agent. Give one reaction each to show its oxidizing nature and its reducing nature.

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Solution

The structural formula of sulphur dioxide is $S O_{2}$ , and its a covalent planar molecule which is V $-$ shaped with an angle of $120^{o}$ .
Sulphur dioxide as oxidising agent : (Hydrogen sulphide)
Claus Process : $S O_{2} + 2 H_{2} S ⟶ 3 S + 2 H_{2} O$
sulphur dioxide elemental sulphur water
Sulphur dioxide as reducing agent :
$S O_{2} + {C l}_{2} ⟶ S O_{2} {C l}_{2}$
sulphuryl chloride

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