A) it forms complex with clay particles
B) it coagulates the mud particles
C) it exchanges \[C{{a}^{2+}}\] and \[M{{g}^{2+}}\] ions present in hard water.
D) its sulphate ion is water purifier
Correct Answer: B
Solution :
Alum is widely used to purify water since it coagulates the mud particles.You need to login to perform this action.
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