Alum is used

Q: Alum is used

Alum is a common alum, potassium aluminum sulphate K 2 S O 4 . A l 2 S O 4 3 . 24 H 2 O which makes colloidally suspended impurities in water such as clay to settle down.

as an analgesic
in the purification of water
as a fertilizer
as a disinfectant

Correct Answer: in the purification of water

Explanation:

Alum is a common alum, potassium aluminum sulphate $K 2 S O 4 . A l 2 S O 4 3.24 H 2 O$ which makes colloidally suspended impurities in water such as clay to settle down.

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Alum is used

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