Chemistry
Temporary hardness of water can be removed by:
- Adding sodium chloride
- Boiling
- Adding calcium carbonate
- Leaving it for a few hours.
Related Questions
If a salt on heating gives water vapour, then that salt is:
- Hygroscopic
- Deliquescent
- Hydrated
- Anhydrous
The salt which is the cause of hardness in water:
- Sodium sulphate
- Magnesium bicarbonate
- Sodium chloride
- Calcium nitrate
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
Sodium chloride (common salt) besides being used in kitchen can also be used as the raw material for making:
P — Slaked lime
Q — Washing soda
R — Baking soda
- Only P
- Only Q
- Only R
- Both Q and R