Potassium Permanganate is used for purifying drinking water, because_________?
Correct answer: D. It is an oxidising agent.
- A. It is a sterilising agent.
- B. It dissolves the impurities of water.
- C. It is a reducing agent.
- D. It is an oxidising agent.
Explanation
Potassium permanganate, KMnO4, oxidises many dissolved organic and microbial impurities, so it helps purify water by acting as an oxidising agent. The likely mistake is choosing c, because permanganate accepts electrons and is reduced, but that makes it the oxidising agent rather than a reducing agent.
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About Redox Reactions
Redox reactions involve oxidation and reduction occurring together, with electrons transferred between species or oxidation numbers changing. The topic covers assigning oxidation states, identifying oxidizing and reducing agents, balancing redox equations by oxidation number or half-reaction methods, and connecting chemical changes with galvanic and electrolytic cells.
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