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प्रश्न
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 |
|
|
|
|
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उत्तर
|
Common Name |
Chemical Name |
Formula |
Acid, base or salt |
Efflorescent, hygroscopic or deliquescent substance |
|
Solid caustic potash |
Potassium hydroxide |
KOH |
Base |
Deliquescent substance |
|
Quick lime |
Calcium oxide |
CaO |
Base |
Hygroscopic substance |
|
Oil of vitriol |
Sulphuric acid |
H2SO4 |
Acid |
Hygroscopic substance |
|
Washing soda |
Hydrated sodium carbonate |
Na2CO3.10H2O |
Salt |
Efflorescent substance |
|
Solid caustic soda |
Sodium hydroxide |
NaOH |
Base |
Deliquescent substance |
|
Blue vitriol |
Copper sulphate |
CuSO4 |
Salt |
Efflorescent substance |
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संबंधित प्रश्न
Give one word for the following statement:
A substance which does not contain water .
Give one word for the following statement:
A property due to which a substance absorbs water without dissolving.
Give one word for the following statement:
Water molecules in loose chemical combination with other substances.
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 ‘hydrated’ & ‘anhydrous’ crystals. Give the chemical formula of – the following hydrated crystals -
(a) Washing soda
(b) Gypsum
(c) Blue vitriol
(d) Epsom salt
(e) Glauber’s salt.
State which crystal from (a) to (e) is a pentahydrate.
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 |
Give a reason for the following:
Heating a hydrated copper sulphate crystal is deemed a chemical change.
The molecular formula of green vitriol is MgSO4.7H2O.
Define Hydrated salt.
