Chemistry - Complete P-block Question with Solution | TestHub

Identify the correct order of increasing number of$\text{π}-$bonds in structures of the following molecules.

$\left(\text{I}\right){\text{H}}_{\text{2}}{\text{S}}_{\text{2}}{\text{O}}_{\text{6}}$$\left(\text{II}\right){\text{H}}_{\text{2}}{\text{SO}}_3$$\left(\text{III}\right){\text{H}}_{\text{2}}{\text{S}}_2{\text{O}}_5$