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प्रश्न
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.
पर्याय
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उत्तर
Efflorescence occurs when the vapour pressure of the hydrated crystals is more than the vapour pressure of the atmospheric humidity.
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संबंधित प्रश्न
Give two examples for Deliquescent substance.
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 the names and formulae of two substances
Anhydrous substance
The substance that can remove hydrogen and oxygen atoms in the ratio of 2:1(in the form of water) from the compound.
Name three methods by which hydrous substances can be made anhydrous.
Differentiate between an efflorescent, deliquescent & ‘ hygroscopic substance with suitable examples.
Give a reason for the following:
Heating a hydrated copper sulphate crystal is deemed a chemical change.
Define Hydrated salt.
'A' is a blue coloured crystalline salt. On heating, it loses blue colour and to give 'B'. When water is added, 'B' gives back to 'A'. Identify A and B, write the equation.
