Advertisements
Advertisements
प्रश्न
A hot saturated solution of copper sulphate forms crystals as it cools. Why?
Advertisements
उत्तर
A hot saturated solution of CuSO4 forms crystal as it cools. Because on cooling the water molecules move closer together and there is less space for the solution to hold on to as much of the dissolved solid and so it forms crystals.
APPEARS IN
संबंधित प्रश्न
Give two examples of Crystalline anhydrous substances.
What do you observe when Blue vitriol is heated?
Water turns the colour of anhydrous copper sulphate .................
Give one word for the following statement:
Water molecules in loose chemical combination with other substances.
State the methods by which hydrated salts 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:
In the expression anhydrous copper sulphate, what is meant by “anhydrous”?
Select the correct word from the words in option to complete the sentence:
Efflorescence occurs when the vapour pressure of the hydrated crystals is ____ than the vapour pressure of the atmospheric humidity.
Differentiate between the following:
Deliquescent salt and hygroscopic salt
What happens when MgSO4.7H2O is heated? Write the appropriate equation?
