Question

Name of the chemical substance which is used for quick settling down of fine particle of impurties

Answer 1

Answer:

decantation and sedimentation

Answer 2

Answer:

It is Alum..

Explanation:

An alum is like a stone on which chemicals are rub and it is kept in water with thread and rotated with the thread it helps to make the light particle heavier so that can can settle down easily.