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प्रश्न
Complete the statement by filling the blank with the correct word from the option.
Hygroscopic substance absorb moisture from the atmosphere & _______their original state.
पर्याय
do not change
change
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उत्तर
Hygroscopic substance absorb moisture from the atmosphere & do not change their original state.
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संबंधित प्रश्न
Give two examples of Crystalline anhydrous substances.
Give two examples for Deliquescent substance.
Give one word for the following statement:
A substance which does not contain water .
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 |
|
|
|
|
Differentiate between hydrated and anhydrous crystals with examples. State three defined changes that occur when hydrated copper sulphate is heated.
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.
Select the correct answer from the choice given in the options.
An anhydrous crystal _____.
A hot saturated solution of copper sulphate forms crystals as it cools. Why?
What happens when MgSO4.7H2O is heated? Write the appropriate equation?
