Civil Engineering MCQJE Level Civil Engineering
Alum, when added as a coagulant to water for flocculation,
Environmental EngineeringEnvironmental EngineeringMEDIUM
Choose the correct answer
A
does not require alkalinity in water
B
does not affect the pH value of water
C
increases the pH value of water
D
decreases the pH value of water
Correct Answer
D. decreases the pH value of water
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Alum consumes alkalinity and releases hydrogen ions, so it lowers (decreases) the pH of the water.
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This MCQ belongs to WBPSC JE (Civil) Previous Years Questions Series. Full tests include timed attempts, rank comparison and subject-wise analysis.