Quality of Water on Environmental Studies related Questions and Answers

Question :   Which of the following statement is wrong regarding permanent hardness? 1. It is also called carbonate hardness 2. It is due to the presence of sulfates, chlorides and nitrates of calcium and magnesium 3. It cannot be removed by boiling 4. It requires special methods of water softening to get removed Answer :   1 - It is also called carbonate hardness