Chemistry - Complete Pblock- Question with Solution | TestHub

In presence of dil. Acids, bleaching powder loses oxygen.

$2\mathrm{C}\mathrm{a}\mathrm{O}\mathrm{C}{\mathrm{l}}_2+{\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_4\to \mathrm{C}\mathrm{a}\mathrm{C}{\mathrm{l}}_2+\mathrm{C}\mathrm{a}\mathrm{S}{\mathrm{O}}_4+2\mathrm{H}\mathrm{C}\mathrm{l}\mathrm{O}$

$\mathrm{H}\mathrm{C}\mathrm{l}\mathrm{O}\to \mathrm{H}\mathrm{C}\mathrm{l}+\left[\mathrm{O}\right]$

This oxygen is used for oxidation - bleaching.