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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.
Give two examples of Crystalline anhydrous substances.
What do you observe when Blue vitriol is heated?
Water turns the colour of anhydrous copper sulphate .................
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 |
|
|
|
|
What are hydrous substances? Explain with examples.
Select the correct answer from the choice given in the options.
An anhydrous crystal _____.
Select the correct answer from the choice given in the options.
An anhydrate of a heptahydrate salt _____.
The molecular formula of green vitriol is MgSO4.7H2O.
A hot saturated solution of copper sulphate forms crystals as it cools. Why?
