Multiple choice

Which of the following is not involved in the purification of muddy water?

  1. Sedimentation

  2. Alum

  3. Chlorine

  4. Sieving
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Muddy water can be purified by the process of sedimentation, followed by using alum, which removes the lighter impurities also. This water then may be chlorinated to kill any bacteria and to get pure water. 

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