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प्रश्न
Give two examples of Crystalline anhydrous substances.
उत्तर
Common salt (NaCl), potassium nitrate (KNO3), sugar (C12H22O111), etc.
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संबंधित प्रश्न
The sticky substance formed when soap is added to hard water is ______.
Give the names and formulae of two substances.
Hydrated substance
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.
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:
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 anhydrate of a heptahydrate salt _____.
Name or state the following:
A liquid hydroscopic substance.
Define Hydrated salt.
