A) Forming Si complex with clay particles
B) Sulphate part which combines with the dirt and removes it
C) Aluminium which coagulates the mud particles
D) Making mud water soluble
Correct Answer: C
Solution :
Alum helps in purifying water by \[A{{l}^{3+}}\]ions which coagulate the negative mud particles.You need to login to perform this action.
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