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      Question

      Which of the following gas is used in the preparation of

      the bleaching powder?
      A Oxygen Correct Answer Incorrect Answer
      B Nitrogen Correct Answer Incorrect Answer
      C Chlorine Correct Answer Incorrect Answer
      D Hydrogen Correct Answer Incorrect Answer

      Solution

      Bleaching powder is prepared on a large scale by passing the chlorine gas through a solution that contains calcium hydroxide. Bleaching powder is also sold on the basis of the available chlorine, which is liberated when it is treated with the dilute acid.

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