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Which is the correct method of preparing bleaching powder?

Answer and explanation

Correct answer: Passing chlorine over dry slaked lime

Bleaching powder, commonly represented as calcium oxychloride (CaOCl2) at school level, is prepared by passing chlorine gas over dry slaked lime, Ca(OH)2. The reaction produces the bleaching compound used for disinfecting water and bleaching materials. Thus option A gives the correct preparation method. The other mixtures do not provide the required chemical reaction or product.

Related tags

Bleaching-PowderChlorineSlaked-LimePreparationClass10AcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And Behaviour

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