The bleaching action of bleaching powder is due to:

oxidation

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reduction

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both A and B

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none of these

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Solution

The correct option is A oxidation
Bleaching powder bleaches colored products due to the oxidation reaction which produces nascent oxygen in the reaction making the product colorless.
${2 C a O C l}_{2} + H_{2} {S O}_{4} \to {C a C l}_{2} + {C a S O}_{4} + 2 H C l O$

$2 H C l O \to 2 H C l + [O] c o l o r e d m a t t e r - --------- \to C o l o r l e s s p r o d u c t$

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