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Chemistry
Alum helps in purifying water by
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Q. Alum helps in purifying water by
AIEEE
AIEEE 2002
The p-Block Elements
A
forming Si complex with clay partiles
7%
B
sulphate part which combines with the dirt and removes it
20%
C
coagulaing the mud particles
68%
D
making mud water soluble
5%
Solution:
Alum furnishes $Al^{3+}$ ions which bring about coagulation of negatively charged clay particles, bacteria etc.