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Which substance is mainly used to prepare bleaching powder?

Answer and explanation

Correct answer: Dry slaked lime and chlorine

Bleaching powder is prepared by passing chlorine gas over dry slaked lime, whose chemical name is calcium hydroxide, Ca(OH)₂. The reaction produces bleaching powder, commonly represented as calcium oxychloride, along with water. Therefore, option A is correct. Sodium chloride and water, sodium carbonate with acid, and gypsum with water are not the standard reactants for this preparation.

Related tags

Bleaching-PowderChlorineSlaked-LimeAcids-Bases-SaltsAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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