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Why is bleaching powder useful for disinfecting water?

Answer and explanation

Correct answer: It can provide available chlorine

The governing concept is chemical disinfection by available chlorine. When bleaching powder is added to water, it releases chlorine-containing species that form hypochlorous acid in suitable conditions. These active chlorine species damage microorganisms and help kill disease-causing germs. Therefore option A correctly explains its use. Bleaching powder does not sweeten water, convert it into a metal, or freeze it; those choices are unrelated to its chemical action.

Related tags

Bleaching PowderWater DisinfectionAvailable ChlorineAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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