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Question

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

A
Alum
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B
Charcoal
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C
Kieselguhr
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D
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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