Bleaching action of chlorine is permanent while bleaching action of sulphur dioxide is temporary, why?

Open in App

Solution

Bleaching action of $S O_{2}$ : Bleaching by $S O_{2}$ is permanent due to the process of reduction in the presence of moisture.
$S O_{2} + 2 H_{2} O ⟶ H_{2} S O_{4} + 2 [H]$ (nascent)
Colour material $+ [H] ⟶$ Colourless $a i r - ---- \to$ Colour
Bleaching action of ${C l}_{2}$ : Bleaching by ${C l}_{2}$ is temporary due to the process of oxidation in the presence of moisture.
${C l}_{2} + H_{2} O ⟶ 2 H C l + [O]$ (nascent)
Colour material $+ [O] ⟶$ Colourless

Suggest Corrections

Similar questions

The temporary bleaching action by sulphur dioxide can be reversed by reacting the material with :

C l_{2}

S O_{2}

S O_{2}

Join BYJU'S Learning Program