Bleaching powder is disinfectant for purification of water when water born germs are killed. But disinfectant activity is destroyed. It is due to its disproportionation into:

C a C l_{2}

and

C l_{2}

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C a C l_{2}

and

C a (C l O_{3})_{2}

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C a O

and

C l_{2}

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C a O, C l_{2}

and

C a C l_{2}

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Solution

The correct option is A $C a C l_{2}$ and $C a (C l O_{3})_{2}$
Bleaching powder is disinfectant for purification of water when water born germs are killed. But disinfectant activity is destroyed because of the degradation of high grade of bleaching powder.
These include disproportionation to give $C a (C l O_{3})_{2}$ and $C a C l_{2}$ , and with the evolution of $C l_{2}$ or $O_{2}$ depending on the presence or absence of water.

Option B is the correct answer.

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