Question

Potassium permanganate is used to purify water as it is
1. sterilizing agent
2. oxidizing agent
3. reducing agent
4. leaching agent
5. None of the above/More than one of the above

Answer 1

Correct Answer - Option 2 : oxidizing agent

The correct answer is oxidizing agent.

• Potassium permanganate (KMnO₄) is a strong oxidising agent that oxidizes dissolved impurities from water such as iron, manganese, and hydrogen sulphide (H₂S) by converting them into solid particles.
• These impurities are then filtered out of the water.
• It is a salt consisting of K⁺ and MnO^{− 4} ions.
• It is a strong oxidizing agent.
• It is used as a medication for cleaning wounds and dermatitis.

​Notes:

• Some other chemical disinfectants used for water:
  • Hypo chloride
  • Chlorine dioxide
  • Chlorine
  • Hydrogen peroxide
  • Potassium permanganate
  • Gamma rays
  • Ultraviolet light