Advertisements
Advertisements
प्रश्न
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 |
Advertisements
उत्तर
| List I | List II |
| 1. Green vitriol | D: Heptahydrate |
| 2. Paint | E: Colloidal |
| 3. Magnesium chloride | A: Permanent hardness in water |
| 4. Magnesium bicarbonate | C: Temporary hardness in water |
| 5. Calcium oxide | B: Hygroscopic |
APPEARS IN
संबंधित प्रश्न
Give two examples for Deliquescent substance.
The sticky substance formed when soap is added to hard water is ______.
The substance that can remove hydrogen and oxygen atoms in the ratio of 2:1(in the form of water) from the compound.
Complete the following table:
|
Common Name |
Chemical Name |
Formula |
Acid, base or salt |
Efflorescent, hygroscopic or deliquescent substance |
|
Solid caustic potash |
|
|
|
|
|
Quick lime |
|
|
|
|
|
Oil of vitriol |
|
|
|
|
|
Washing soda |
|
|
|
|
|
Solid caustic soda |
|
|
|
|
|
Blue vitriol |
|
|
|
|
State the methods by which hydrated salts can be made anhydrous.
What are hydrous substances? Explain with 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.
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.
Match the following
| 1. | Blue vitriol | CaSO4.2H2O |
| 2. | Gypsum | CaO |
| 3. | Deliquescence | CuSO4.5H2O |
| 4. | Hygroscopic | NaOH |
What happens when MgSO4.7H2O is heated? Write the appropriate equation?
