Question

For purifying drinking water alum is used

A.for coagulation of mud particles

B.to kill bacteria

C.to remove salts

D.to remove gases

Answer 1

Hello!

answer is optionA

hope helped

Answer 2

hi my dear friend,


alum is used for coagulation of mud particles from the water as some water even after purifying there remains some mud particles so to remove that microscopic particles alum is helped.


hope it helps you.