Use of _______ helps in water purification.

Sodium

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Alum

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Chlorine

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Both B and C

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Solution

The correct option is D Both B and C
There are several source of water pollution like industrial effluents, sewage water, radiobiological pollutants etc. Alum is used to clarify water by coagulating soil or mud particles whereas chlorine makes water free from pathogenic bacteria.

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Similar questions

Which of the following substances are used in water purification for a small quantity of water?

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