Civil Engineering - UPSC Civil Service Exam Questions - Discussion
Discussion Forum : UPSC Civil Service Exam Questions - Section 23 (Q.No. 15)
15.
Consider the following statements :
1. Alum coagulation decreases the alkalinity of water.
2. Alum coagulation increases permanent hardness of water.
3. Alum coagulation decreases pH of water.
4. Alum coagulation produces aluminium hydroxide flocks in the flocculation process.
Which of the statements given above are correct ?
1. Alum coagulation decreases the alkalinity of water.
2. Alum coagulation increases permanent hardness of water.
3. Alum coagulation decreases pH of water.
4. Alum coagulation produces aluminium hydroxide flocks in the flocculation process.
Which of the statements given above are correct ?
Discussion:
1 comments Page 1 of 1.
Yunesh said:
3 years ago
Alum also increade the permanent hardness of water.
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