Which of the following salt is the main cause of the permanent hardness of water?
A. Magnesium sulfate
B. Magnesium carbonate
C. Magnesium bicarbonate
D. All of these
Answer:A
Which of the following salt is the main cause of the permanent hardness of water?
A. Magnesium sulfate B. Magnesium carbonate C. Magnesium bicarbonate D. All of these