Q. Which of the following statements is true about the composition of Calcium Carbonate (CaCo3) in soft water?
- 0 to 30 milligrams of CaCO3 per litre
- 30 to 60 milligrams of CaCO3 per litre
- 60 to 90 milligrams of CaCO3 per litre
- 90 to 120 milligrams of CaCO3 per litre
Answer: 30 to 60 milligrams of CaCO3 per litre.
