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Question

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

A

Mohr salt

B

Alum

C

Bleaching powder

D

Copper sulphate

Hard

Solution

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Correct option is
B

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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