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प्रश्न
The sticky substance formed when soap is added to hard water is ______.
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उत्तर
The sticky substance formed when soap is added to hard water is scum.
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संबंधित प्रश्न
Define water of crystallization. Give two examples with formulae.
What do you observe when Blue vitriol is heated?
Water turns the colour of anhydrous copper sulphate .................
Give the names and formulae of two substances.
Hydrated substance
Give the names and formulae of two substances
Anhydrous substance
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.
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.
What happens when MgSO4.7H2O is heated? Write the appropriate equation?
