Why alum is used to purify muddy water? – McqOptions

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1.	Why alum is used to purify muddy water?
A.	Mud gets dissolved due to alum
B.	Mud floats due to alum
C.	Mud settles down due to alum
D.	Alum kills germs from muddy water
Answer» D. Alum kills germs from muddy water

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