Question

give reason for following A piece of alum is generally added to impure drinking water.​

Answer 1

Explanation:

Alum is added to purify water. Alum is aluminium sulfate. It acts as a coagulant. ... Being large, these particles can be removed by filtration, or when they settle down due to gravity, they can be removed through decantation, giving us pure water.

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Answer 2

Answer:

A piece of alum is added to impure drinking water BECAUSE it attracts all the dirt particles towards it and hence purify the water....

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