# Chlorine water loses its yellow colour on standing because ______. - Chemistry

MCQ
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Chlorine water loses its yellow colour on standing because ______.

#### Options

• HCl gas is produced, due to the action of sunlight.

• A mixture of HOCl and HCl is produced in the presence of light.

• HOCl and hydrogen gas is produced.

• A mixture of HCl and ClO3 is produced, due to the action of sunlight.

#### Solution

Chlorine water loses its yellow colour on standing because a mixture of HOCl and HCl is produced in the presence of light.

Explanation:

$\ce{Cl_{2(g)} + H2O (l) -> HCl (g) + HOCl(aq)}$

Concept: P - Block Group 17 Elements - Chlorine
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