MCQ
Bleaching action of $S{O_2}$ is due to
- ✓Reduction
- BOxidation
- CHydrolysis
- DIts acidic nature
✓
Answer
Correct option: A.
Reduction
a
(a) $2H_2O$ + $SO_2$ $\to$ $H_2SO_4$ + $2[H]$ (nascent hydrogen)
(a) $2H_2O$ + $SO_2$ $\to$ $H_2SO_4$ + $2[H]$ (nascent hydrogen)
Coloured flower $ + \,2[H] \to $Colourless flower
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