can anyone answer these questions
1.why does visibility increase after rainfall.
2. suspended impurities in water sink to bottom on adding alum .give reason?
Answers
Answered by
3
1) Visibility increase beacause when there is rainfall all the dust particules along with the raindrop settle down on the surface hence clearing the visibility
2)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.
Answered by
1
1) visibility increase after rainfall as the dust particles
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