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Which gas is used to prepare bleaching powder?

Answer and explanation

Correct answer: Chlorine

Bleaching powder is prepared by passing chlorine gas over dry slaked lime, which is calcium hydroxide. The reaction produces bleaching powder containing available chlorine, so chlorine is the required reactant. Hydrogen and nitrogen do not form bleaching powder, while carbon dioxide is not the bleaching or disinfecting gas involved in this preparation. Therefore, option B is correct.

Related tags

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

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