Potassium Permanganate is used for purifying drinking water, because

ক. it dissolves the impurities of water

খ. it is a reducing agent

গ. it is a sterilising agent

ঘ. it is an oxidising agent

উত্তর: it is an oxidising agent

ব্যাখ্যা: Potassium permanganate (KMnO4) is used in drinking water purification primarily because it is a strong oxidizing agent. It oxidizes dissolved impurities like iron and manganese into insoluble forms that can be filtered out. It also breaks down certain organic compounds causing taste and odor issues. While it has some sterilizing properties, its main role is the chemical transformation of impurities through oxidation, rather than dissolving them or acting as a reducing agent.

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