Multiple choice

Which one of the following is extensively used for sterilizing water?

  1. Bleaching powder

  2. Alum

  3. Borax powder

  4. Soda powder
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A Correct answer
Explanation

Bleaching powder (calcium hypochlorite) is extensively used for water sterilization because it releases chlorine when dissolved in water, which kills bacteria and other microorganisms. It's cost-effective, stable, and widely used in municipal water treatment systems.

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