![Which of the following salts is the main cause of permanent hardness of water?](https://www.gkseries.com/blog/wp-content/uploads/2022/09/Which-of-the-following-salts-is-the-main-cause-of-permanent-hardness-of-water.png)
Q. Which of the following salts is the main cause of permanent hardness of water?
- Magnesium sulphate
- Magnesium bicarbonate
- Magnesium carbonate
- None of the above
Answer: Magnesium sulphate.
Answer: Magnesium sulphate.
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