Alum as a coagulant is found to be most effective when pH range of wat – McqOptions

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1.	Alum as a coagulant is found to be most effective when pH range of water is$?
A.	2 to 4
B.	4 to 6
C.	6 to 8
D.	8 to 10
Answer» D. 8 to 10

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