Advertisements
Advertisements
प्रश्न
What do you observe when Blue vitriol is heated?
उत्तर
Blue vitriol is blue in colour as it contains 5 molecules of water of crystallization (CuSO4.H2O). When it is heated, it loses water of crystallization and becomes anhydrous CuSO4 which is grey-white in colour.
APPEARS IN
संबंधित प्रश्न
Give the names and formulae of two substances
Anhydrous substance
What are drying or desiccating agents? Give examples.
Name three methods by which hydrous substances can be made anhydrous.
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 _____.
Differentiate between the following:
Deliquescent salt and hygroscopic salt
The molecular formula of green vitriol is MgSO4.7H2O.
Define Hydrated salt.
A hot saturated solution of copper sulphate forms crystals as it cools. Why?
