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प्रश्न
What is permanent hardness of water? How can it be removed?
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उत्तर
The hardness due to the presence of chloride and sulphate salts of calcium and magnesium is known as the permanent hardness of the water.
Removal of hardness:
- Adding washing soda.
- Washing soda is used to remove the permanent hardness of the water.
- It converts chlorides and sulphates into insoluble carbonates.
- These insoluble carbonates are removed by filtration.
- Distillation
- Temporary and permanent hardness both can be removed by the method of distillation.
- The water obtained after distillation is called distilled water.
- It is the purest form of water.
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संबंधित प्रश्न
Give two examples of hydrated substances.
Give two examples for Efflorescent substance.
Name the compound responsible for permanent hardness of water.
Suggest one method for the removal along with the reaction for temporary hardness.
Temporary hardness of water can be removed by
Differentiate between Hard & soft water with suitable examples.
Fill in the blank:
Hard and soft water can be distinguished using _____.
Explain the meaning of the terms – hard water & soft water.
Permanent hardness of water is due to the presence of _______.
Temporary hardness of water can be removed by ________ of water.
