Question

Why is alum Used in purification of river water?

Answer 1

Aluminium Sulfate, Shortly known asAlum, 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.

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Answer 2

Alum (fitkari) is used to make water purify because it is a recyclable thing which can be used to make the water clean as it absorbs all the impurities and settle them down.....