Chemistry - Complete P-block Question with Solution | TestHub

${\mathrm{SO}}_2$ reacts readily with sodium hydroxide solution, forming ${\mathrm{H}}_2\mathrm{S}$, which then reacts with more sulphur dioxide to form sodium hydrogen sulphite.

In the reaction of ${\mathrm{SO}}_2$ with water and alkalies, the behaviour of sulphur dioxide is totally different from carbon dioxide.

Sulphur dioxide reacts with chlorine in the presence of ${\mathrm{NH}}_3$ (which acts as a catalyst) to give sulphuryl chloride, ${\mathrm{SO}}_2{\mathrm{Cl}}_2$.

${\mathrm{SO}}_2$ is oxidised to sulphur trioxide by oxygen in the presence of vanadium(V) oxide catalyst.