Alum [Al2(SO4)3] is used as a coagulant in water treatment to remove____________________?
Correct answer: B. All A , B. and C.
- A. Colour
- B. All A , B. and C.
- C. Bacteria
- D. Turbidity
Explanation
Alum destabilizes suspended particles so they form settleable flocs, reducing turbidity and some colour. It also helps remove microorganisms carried with the flocs, so the broad treatment answer is all of these.
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