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Hydrogen — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryHydrogen1 Mark
Question
Why does chlorine water loses its colour if kept for long time?
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Answer

$\text{Cl}_2+\text{H}_2\text{O}\xrightarrow{\ \ \ \ }\text{HCl}+\text{HOCl}$
$\text{HOCl}\xrightarrow{\ \ \ \ }\text{HCl}+[\text{O}]$
HCl is colourless, therefore, chlorine water loses its colour.

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