In the manufacture of bleaching powder, chlorine gas reacts with which substance?
Answer and explanation
Correct answer: Dry slaked lime
Bleaching powder is manufactured by passing chlorine gas over dry slaked lime, whose chemical formula is Ca(OH)2. The commonly represented reaction is 2Ca(OH)2 + 2Cl2 → Ca(OCl)2 + CaCl2 + 2H2O. Thus dry slaked lime is the required reactant. Sodium chloride is used to prepare brine, calcium carbonate is a limestone compound, and sodium hydroxide is not the standard material in this preparation. Therefore A is correct.
Frequently asked questions
What is the correct answer to this question?
Dry slaked lime
Why is this the correct answer?
Bleaching powder is manufactured by passing chlorine gas over dry slaked lime, whose chemical formula is Ca(OH)2. The commonly represented reaction is 2Ca(OH)2 + 2Cl2 → Ca(OCl)2 + CaCl2 + 2H2O. Thus dry slaked lime is the required reactant. Sodium chloride is used to prepare brine, calcium carbonate is a limestone compound, and sodium hydroxide is not the standard material in this preparation. Therefore A is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
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