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प्रश्न
Define water of crystallization. Give two examples with formulae.
उत्तर
The fixed amount of water which is in loose chemical combination with a salt in its crystal is called water of crystallization.
Examples:
| Common name | Chemical name | Formulae |
| Blue vitroil | Copper sulphate pentahydrate |
CuSO4 5H2O |
| Green vitriol | Iron (2) sulphate heptahydrate | FeSO4 7H2O |
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संबंधित प्रश्न
Give two examples for Deliquescent substance.
Water turns the colour of anhydrous copper sulphate .................
Give the names and formulae of two substances.
Hydrated substance
The substance that can remove hydrogen and oxygen atoms in the ratio of 2:1(in the form of water) from the compound.
What are hydrous substances? Explain with examples.
Differentiate between an efflorescent, deliquescent & ‘ hygroscopic substance with suitable examples.
Match the substances in List I with the appropriate answer in List II.
| List I | List II |
| 1. Green vitriol | A: Permanent hardness in water |
| 2. Paint | B: Hygroscopic |
| 3. Magnesium chloride | C: Temporary hardness in water |
| 4. Magnesium bicarbonate | D: Heptahydrate |
| 5. Calcium oxide | E: Colloidal |
Explain the following observation:
In the expression anhydrous copper sulphate, what is meant by “anhydrous”?
Select the correct answer from the choice given in the options.
An anhydrate of a heptahydrate salt _____.
The molecular formula of green vitriol is MgSO4.7H2O.
