Discussion
Bleaching powder used for disinfection is chemically
Answer: B
Correct answer: calcium hypochlorite with calcium chloride
Bleaching powder is a mixed product of chlorine and slaked lime, containing calcium hypochlorite together with calcium chloride. The hypochlorite is the active disinfectant, releasing hypochlorous acid in water. It is convenient because it is a solid, but it loses strength in storage and leaves a lime residue, which is why liquid hypochlorite or chlorine gas is preferred at scale.
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