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 mcqsQ. Which of the following salts is the main cause of permanent hardness of water?Magnesium sulphateMagnesium bicarbonateMagnesium carbonateNone of the aboveAnswer: 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
