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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. Dry slaked lime is calcium hydroxide, Ca(OH)2, and passing chlorine over it produces bleaching powder, commonly represented as CaOCl2, along with water under the usual school-level description. Moisture is avoided because the lime must remain dry for proper preparation. Therefore A is correct.

Related tags

Bleaching PowderChlorineSlaked LimeAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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