Question

Why is Bleaching powder hygroscopic?

Answer 1

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Bleaching powder is hygroscopic, i.e. it tends to absorb moisture. ... As it absorbs moisture it loses chlorine and thus loses its bleaching property. Bleaching powder reacts with air. When bleaching powder is exposed to air it reacts with Carbon dioxide present in the air to produce Calcium carbonate and Chlorine gas.

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Answer 2

Bleaching powder is hygroscopic,

. it tends to absorb moisture. So when kept open to air it absorbs moisture from atmosphere and becomes soggy over a period of time. As it absorbs moisture it loses chlorine and thus loses its bleaching property. Bleaching powder reacts with air.

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