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

1. CaOCl2
2. Ca(OCl)2
3. CaO2Cl
4. CaCl2

Correct answer: Ca(OCl)2

Solution

The active ingredient in bleaching powder responsible for its bleaching action is calcium hypochlorite, Ca(OCl)2, which releases chlorine upon reaction with water.

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