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Why do we add alum to purify water?

Options

  1. AAlum kills harmful bacteria in water.
  2. BAlum neutralizes acidity in water.
  3. CAlum helps in the coagulation of impurities, making them settle down.
  4. DAlum enhances the taste of water.

Correct answer

C. Alum helps in the coagulation of impurities, making them settle down.

Step-by-step solution

Correct Option is : (C) Alum helps in the coagulation of impurities, making them settle down.

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