Chemistry
The salt which is the cause of hardness in water:
- Sodium sulphate
- Magnesium bicarbonate
- Sodium chloride
- Calcium nitrate
Water
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Answer
Magnesium bicarbonate
Reason — Hardness in water is due to the presence of bicarbonates, chlorides or sulphates of calcium or magnesium.
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Related Questions
Which of the following is a deliquescent salt ?
- CuSO4
- FeCl3
- KCl
- ZnSO4
If a salt on heating gives water vapour, then that salt is:
- Hygroscopic
- Deliquescent
- Hydrated
- Anhydrous
Temporary hardness of water can be removed by:
- Adding sodium chloride
- Boiling
- Adding calcium carbonate
- Leaving it for a few hours.
The salt which does not contain any water of crystallisation is :
P — Blue vitriol
Q — Gypsum
R — Baking soda
- Only P
- Only Q
- Only R
- Both Q and R