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प्रश्न
The process of separation or deposition of crystals from a hot saturated solution on gentle cooling of the solution is called ‘crystallization’. With reference to the statement explain what is meant by ‘water of crystallization. State which physical properties of a crystal are correlated with the water of crystallization.
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उत्तर
The water of crystallization is the number of water molecules that combine chemically – in definite proportion with the – concerned salt in the crystalline state.
Or
Some salts, while crystallizing out from their solutions unite with a definite quantity of water, which is known as the water of crystallization. Physical properties are that crystals are solid, definite regular shapes.
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संबंधित प्रश्न
Give two examples for Deliquescent substance.
The sticky substance formed when soap is added to hard water is ______.
Complete the following table:
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Common Name |
Chemical Name |
Formula |
Acid, base or salt |
Efflorescent, hygroscopic or deliquescent substance |
|
Solid caustic potash |
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Quick lime |
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Oil of vitriol |
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Washing soda |
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Solid caustic soda |
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Blue vitriol |
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Name three methods by which hydrous substances can be made anhydrous.
Select the correct word from the words in option to complete the sentence:
Efflorescence occurs when the vapour pressure of the hydrated crystals is ____ than the vapour pressure of the atmospheric humidity.
Select the correct answer from the choice given in the options.
An anhydrous crystal _____.
Differentiate between the following:
Deliquescent salt and hygroscopic salt
The molecular formula of green vitriol is MgSO4.7H2O.
Define Hydrated salt.
What happens when MgSO4.7H2O is heated? Write the appropriate equation?
