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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
Define water of crystallization. Give two examples with formulae.
Give the names and formulae of two substances
Anhydrous substance
Complete the following table:
|
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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What are hydrous substances? Explain with examples.
Name three methods by which hydrous substances can be made anhydrous.
Differentiate between hydrated and anhydrous crystals with examples. State three defined changes that occur when hydrated copper sulphate is heated.
Select the correct answer from the choice given in the options.
An anhydrous crystal _____.
Give a reason for the following:
Heating a hydrated copper sulphate crystal is deemed a chemical change.
Name or state the following:
A liquid hydroscopic substance.
What happens when MgSO4.7H2O is heated? Write the appropriate equation?
