Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Environmental Science

Which of the following are most commonly used coagulant during water treatment processes?

1.Alum
2. FeCl3
3. Lime-Soda
4. FeSO4

1
1 only
2
2 and 3 only
3
1 and 3 only
4
1, 2 and 4 only
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