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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
What do you observe when Blue vitriol is heated?
Give one word for the following statement:
A substance which does not contain water .
What are drying or desiccating agents? Give examples.
Complete the following table:
|
Common Name |
Chemical Name |
Formula |
Acid, base or salt |
Efflorescent, hygroscopic or deliquescent substance |
|
Solid caustic potash |
|
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|
|
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Quick lime |
|
|
|
|
|
Oil of vitriol |
|
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|
|
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Washing soda |
|
|
|
|
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Solid caustic soda |
|
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|
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Blue vitriol |
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State the methods by which hydrated salts can be made anhydrous.
Complete the statement by filling the blank with the correct word from the option.
Hygroscopic substance absorb moisture from the atmosphere & _______their original state.
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.
What happens when MgSO4.7H2O is heated? Write the appropriate equation?
