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प्रश्न
Name or state the following:
A liquid hydroscopic substance.
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उत्तर
A liquid hygroscopic substance - concentrated sulphuric acid (cone. H2SO4)
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संबंधित प्रश्न
Give one word for the following statement:
A property due to which a substance absorbs water without dissolving.
What are hydrous substances? Explain with examples.
Name three methods by which hydrous substances can be made anhydrous.
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.
Differentiate between an efflorescent, deliquescent & ‘ hygroscopic substance with suitable examples.
Complete the statement by filling the blank with the correct word from the option.
Hygroscopic substance absorb moisture from the atmosphere & _______their original state.
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”?
Explain the following observation:
Why is fused calcium chloride or cone, sulphuric acid used in a desiccator?
What happens when MgSO4.7H2O is heated? Write the appropriate equation?
