Chlorine water on standing loses its colour a | vedclass

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(C) Chlorine water is yellow in colour due to the presence of dissolved $Cl_2$. On standing,$Cl_2$ reacts with water to form hydrochloric acid and hyp

Vedclass · Accepted Answer

$HCl$ and $HOCl$

Vedclass · Answer

(C) Chlorine water is yellow in colour due to the presence of dissolved $Cl_2$. On standing,$Cl_2$ reacts with water to form hydrochloric acid and hypochlorous acid. The reaction is: $Cl_2 + H_2O 	o HCl + HOCl$. Since $HOCl$ is unstable,it further decomposes to give $HCl$ and nascent oxygen,which causes the bleaching action and loss of colour.

Chlorine water on standing loses its colour and forms:

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