Question

Sometimes alum is added to separated solid particles from liquid.Why?​

Answer 1

Answer:

Hi.....

Explanation:

Alum is added to seperated solid particles from liquid because:

(a) Alum dissolves the impurities in water.

(b) Alum causes the impurities to stick to it and settle down.

(c) Alum makes the impurities lighter so that they can float on water and can then be removed easily.

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