A coagulating agent frequently added to water to remove the suspended and colloid impurities is:

Mohr salt

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Alum

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Bleaching powder

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Copper sulphate

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Solution

The correct option is C Alum
Alum is a coagulating agent, frequently added to water to remove impurities from water because impurities contain negative charge and alum give positive charge particle for coagulation.

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