Bleaching powder loses its power on keeping for a long time because :

it changes into calcium hypochlorate

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it changes into calcium chloride and calcium hydroxide

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it absorbs moisture

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it changes into calcium chloride and calcium chlorate

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Solution

The correct option is C it changes into calcium chloride and calcium chlorate
On long standing, it undergoes auto-oxidation into calcium chlorate and calcium chloride.

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Bleaching powder loses its power on keeping for a long time because :

The correct option is C it changes into calcium chloride and calcium chlorateOn long standing, it undergoes auto-oxidation into calcium chlorate and calcium chloride.

The correct option is C it changes into calcium chloride and calcium chlorate
On long standing, it undergoes auto-oxidation into calcium chlorate and calcium chloride.