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  4. Bleaching action of CaOCl2 is due to

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Q. Bleaching action of $CaOCl_{2}$ is due to

UP CPMTUP CPMT 2006

Solution:

In presence o f a slight amount o f dilute acid, bleaching powder $(CaOCl_{2})$ loses its oxygen
$2CaOCl_{2}+H_{2}SO_{4} \to CaCl_{2}+CaSO_{4}+2HClO HClO \to HCl + [O]$
On account of the formation of nascent oxygen, bleaching powder shows bleaching properties Coloured matter $+[O] \to$ Colourless matter