Chemistry
Temporary hardness of water can be removed by
- filtering
- boiling
- loading
- none of the above
Water
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Answer
Boiling
Reason — Boiling helps to remove the temporary hardness of water. When temporary hard water is boiled, the bicarbonates of calcium and magnesium break up to form their respective insoluble carbonates. These can be filtered out and the water becomes soft.
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Related Questions
Which of the following salts cause permanent hardness of water ?
- Calcium sulphate
- Calcium bicarbonate
- Sodium chloride
- Magnesium nitrate
The substance which can remove permanent hardness of water is :
- sodium bicarbonate
- sodium carbonate
- sodium hydroxide
- sodium chloride
Assertion (A): Water is a universal solvent.
Reason (R): We use water daily for drinking, washing, bathing, etc.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): Water exists in all the three states of matter.
Reason (R): On cooling, liquid water changes into ice, the solid state. On heating, it changes into vapour, the gaseous state.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.