A coagulating agent frequently added to water to remove the suspended and colloid impurities is:
A
Alum
B
Mohr salt
C
Bleaching powder
D
Copper sulphate
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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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