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प्रश्न
Differentiate between the following:
Deliquescent salt and hygroscopic salt
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उत्तर
| Deliquescent salt | Hygroscopic salt: |
| Water soluble salts which on exposure to the atmosphere absorb moisture from the atmosphere dissolve in the absorbed moisture and change into liquid state are called Deliquescent salt. e.g. washing soda (Na2CO3.10H2O) | Absorb water or moisture from the atmosphere when exposed but do not change their state like delinquent salts. e.g. Cone. H2SO4, quick lime CaO. |
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संबंधित प्रश्न
What do you observe when Blue vitriol is heated?
Water turns the colour of anhydrous copper sulphate .................
Give the names and formulae of two substances
Anhydrous substance
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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State the methods by which hydrated salts can be made anhydrous.
Differentiate between an efflorescent, deliquescent & ‘ hygroscopic substance with suitable examples.
Differentiate the function of concentrated sulphuric acid as a drying agent & as a dehydrating agent. Is fused calcium chloride a dehydrating or a desiccating agent. Give reasons.
Explain the following observation:
Why is fused calcium chloride or cone, sulphuric acid used in a desiccator?
Select the correct answer from the choice given in the options.
An anhydrous crystal _____.
What happens when MgSO4.7H2O is heated? Write the appropriate equation?
