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Q. Which one of the following is present as an active ingredient in bleaching powder for bleaching action?

AIPMTAIPMT 2011The s-Block Elements

Solution:

Calcium hypochlorite is an inorganic compound with formula $Ca ( OCl )_{2}$. It is the main active ingredient of commercial products called bleaching powder, chlorine powder, or chlorinated lime, used for water treatment and as a bleaching agent
$Ca ( OCl )_{2} $ is active ingredient which is responsible for bleaching action. Bleaching powder formula
$Ca ( OCl )_{2} .CaCl _{2} .Ca ( OH )_{2} .2 H _{2} O$