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In the manufacture of bleaching powder, chlorine is passed over which substance?

Answer and explanation

Correct answer: Dry slaked lime

The standard preparation of bleaching powder involves passing chlorine gas over dry slaked lime, calcium hydroxide, Ca(OH)₂. The product is commonly represented as calcium oxychloride, CaOCl₂, though commercial bleaching powder can have a more complex composition. Drying is important because the process is carried out with dry slaked lime. Sodium chloride, gypsum, and washing soda are not the reactants used in this preparation. Therefore option A is correct.

Related tags

Bleaching PowderSlaked LimeChlorineAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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