Which one of the following salts is responsible for temporary hardness of water ?
- A. Sulphates of calcium
- B. Chlorides of magnesium
- C. Bicarbonates of magnesium ✓
- D. Sulphates of magnesium
Correct Answer: C. Bicarbonates of magnesium
Explanation
Temporary hardness of water is caused by the presence of dissolved bicarbonates of calcium and magnesium.
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