Discussion
The chemical formula of bleaching powder is
Answer: C
The formula given for bleaching powder is \(Ca(OCl)_{2}\).
Bleaching powder is made by passing chlorine over dry slaked lime, and is often written \(CaOCl_{2}\) (calcium oxychloride). Its active bleaching and disinfecting component is calcium hypochlorite, \(Ca(OCl)_{2}\), which releases chlorine, and this is the formula the key accepts.
\(MgCO_{3}\) is magnesium carbonate, \(BaCO_{3}\) barium carbonate and \(CaSO_{4}\) calcium sulphate (the basis of gypsum and plaster of Paris); none is a bleaching agent.
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