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Which of the following is used to purify water?

Question and options

Which of the following is used to purify water?
  1. Potassium Permanganate
  2. Potassium Sulphate
  3. Potassium Chloride
  4. Potassium Nitrate

Answer and explanation

Correct answer: A - Potassium Permanganate
Potassium permanganate (KMnO4\mathrm{KMnO_4}) is a strong oxidising agent used to disinfect and purify well water. Potassium sulphate, potassium chloride and potassium nitrate are fertiliser salts with no disinfecting action.

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