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प्रश्न
What are drying or desiccating agents? Give examples.
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उत्तर
These are substances which can readily absorb moisture from other substances without chemically reacting with them.
Examples:
Phosphorous pentoxide (P2O5), quick lime (CaO)
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संबंधित प्रश्न
Define water of crystallization. Give two examples with formulae.
Give two examples of Crystalline anhydrous substances.
Give two examples for Deliquescent substance.
The sticky substance formed when soap is added to hard water is ______.
Complete the statement by filling the blank with the correct word from the option.
Hygroscopic substance absorb moisture from the atmosphere & _______their original state.
Explain the following observation:
Why is fused calcium chloride or cone, sulphuric acid used in a desiccator?
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 _____.
Select the correct answer from the choice given in the options.
An anhydrate of a heptahydrate salt _____.
Give a reason for the following:
Heating a hydrated copper sulphate crystal is deemed a chemical change.
