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Which of the following chemical equations correctly represents the reaction of bleaching powder with hydrochloric acid?

1. CaOCl2 + 2HCl → CaCl2 + H2O + Cl2
2. Chlorine gas reacts with dry slaked lime, Ca(OH)2, at 40°C to form bleaching powder
3. Ca(OH)2 + Cl2 → CaOCl2 + H2O
4. None of these

Correct answer: CaOCl2 + 2HCl → CaCl2 + H2O + Cl2

Solution

The reaction given in option A correctly represents the reaction of bleaching powder (CaOCl2) with HCl to produce calcium chloride (CaCl2), water (H2O), and chlorine gas (Cl2).

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