Question

Explain how alum helps to separate suspended impurities from a mixture of sand and water

Answer 1

Answer:

alum is a substance which helps to clean the water. if we keep alum in impure water and kept the container untouched the impure particles become dense and settle down in the bottom of the container. and in this way we are able to purify the water.

Answer 2

Alum is a substance which helps to clean the water. if we keep alum in impure water and kept the container untouched the impure particles become dense and settle down in the bottom of the container. and in this way we are able to purify the impure water faster than usual