Which one of the following is used as a disinfectant in water treatment?

Alum

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Charcoal

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Kieselguhr

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Potassium permanganate

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Solution

The correct option is D Potassium permanganate
Water disinfection means removal, deactivation or killing of pathogenic microorganisms. Microorganisms are destroyed or deactivated resulting in termination of growth and reproduction.
Potassium permanganate is a weak disinfectant, hence, used in water.

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Which one of the following is not used for disinfection of drinking water?

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