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Chemistry MCQs

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What is the chemical formula for bleaching powder used in water purification?

  • A Ca(OH)2
  • B CaCO3
  • C Ca(OCl)Cl
  • D CaCl2
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Correct Answer: Option C — Ca(OCl)Cl
Explanation: Bleaching powder is calcium hypochlorite chloride Ca(OCl)Cl made by passing chlorine gas over slaked lime and used as a disinfectant and bleaching agent.
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