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To prepare bleaching powder, chlorine is passed over which substance?

Answer and explanation

Correct answer: Dry slaked lime

The governing preparation is the reaction of chlorine with dry slaked lime. Slaked lime is calcium hydroxide, Ca(OH)₂; when chlorine is passed over it in the dry state, bleaching powder is formed. Therefore option A is correct. Common salt is a starting material for producing chlorine industrially but is not the direct solid used in this step. Gypsum and washing soda have different compositions and roles and do not form bleaching powder in this reaction.

Related tags

Bleaching PowderSlaked LimeChlorine ReactionAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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