The alum, when added as a coagulant in water
A. does not require alkalinity in water for flocculation
B. does not affect pH value of water
C. increases pH value of water
D. decreases pH value of water
Answer:D
The alum, when added as a coagulant in water
A. does not require alkalinity in water for flocculation B. does not affect pH value of water C. increases pH value of water D. decreases pH value of water