Question

Give reason that alum is used in purification of river water
Give reason that alum is used in purification of river water

Answer 1

Alum, when added to raw water reacts with the bicarbonate alkalinities present in water and forms a gelatinous precipitate. This floc attracts other fine particles and suspended material in raw water, and settles down at the bottom of the container.

PLS MARK BRAINLIEST. PLZ PLZ PLZ

Answer 2

Explanation:

alum help in loading and hence help the fine solid particles to settle down is and get pure water