Q.

Which material is used for removing fluorides from hard water containing 3ppm of fluorides?

A. lime
B. copper sulfate
C. synthetic tri-calcium phosphate
D. bone charcoal
Answer» A. lime
Explanation: lime is suitable for removing fluorides from hard water containing less than 4ppm. magnesium is also removed when this material is used for defluoridation.
2.5k
0
Do you find this helpful?
18

Discussion

No comments yet