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प्रश्न
Give two examples of hydrated substances.
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उत्तर
- Washing soda (Na2CO3.10H2O)
- Gypsum (CaSO4.2H2O)
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संबंधित प्रश्न
Give two examples for Efflorescent substance.
What do you observe when Washing soda is exposed to air ?
Define the Hard water.
Suggest one method for the removal along with the reaction for temporary hardness.
Boiling removes the ................ hardness of water.
Explain the permutit method for softening hard water.
Give reason for the following:
Hardness in temporary water can be removed by boiling, but hardness in permanent hard water cannot.
Using given sample of temporary and permanent hard water, soft water, ordinary soap, detergent and washing soda how would you prove the advantage of detergent over soap.
Permanent hardness of water is due to the presence of _______.
Temporary hardness of water can be removed by ________ of water.
