Which of the following salts is the main cause of permanent hardness of water? HomeWater Pollution MCQsWhich of the following salts is the main cause of permanent hardness of water? water pollution mcqs Q. Which of the following salts is the main cause of permanent hardness of water? Magnesium sulphateMagnesium bicarbonateMagnesium carbonateNone of the above Answer: Magnesium sulphate.
The central pollution control board and the department of ocean and environment has established __________ stations over the entire coastal line of the country
