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Question

Chlorine water on standing loses its colour and forms :

A
HOCl and HOCl2
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B
HCl only
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C
HCl and HClO2
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D
HCl and HOCl
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Solution

The correct option is D HCl and HOCl
Chlorine water on standing loses its colour and forms HCl and HOCl.

Cl2+H2OHCl+HOCl

This is a disproportionation reaction.

The hypochlorous acid so formed gives nascent oxygen which is responsible for oxidizing and bleaching properties of chlorine.

Hence, option D is correct.

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