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Question
Chemistry
Why is alum added to water containing suspended impurities?
Q. Why is alum added to water containing suspended impurities?
1711
239
Surface Chemistry
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A
To make a colloidal solution
9%
B
To coagulate the suspended impurities
60%
C
To remove impurities of calcium and magnesium
20%
D
To protect the colloidal solution from getting precipitated
11%
Solution:
The water obtained from natural sources often contains suspended impurities. Alum is added to such water to coagulate the suspended impurities and make water fit for drinking purposes.