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प्रश्न
What are hydrous substances? Explain with examples.
उत्तर
Substances which contain water molecules along with salt are hydrated substances.
Examples: Sodium carbonate decahydrate: Na2CO3.10H2O
Copper sulphate pentahydrate: CuSO4.5H2O
APPEARS IN
संबंधित प्रश्न
Give two examples for Deliquescent substance.
What do you observe when Blue vitriol is heated?
Water turns the colour of anhydrous copper sulphate .................
Give one word for the following statement:
A property due to which a substance absorbs water without dissolving.
Name three methods by which hydrous substances can be made anhydrous.
Differentiate between ‘hydrated’ & ‘anhydrous’ crystals. Give the chemical formula of – the following hydrated crystals -
(a) Washing soda
(b) Gypsum
(c) Blue vitriol
(d) Epsom salt
(e) Glauber’s salt.
State which crystal from (a) to (e) is a pentahydrate.
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 _____.
Give a reason for the following:
Heating a hydrated copper sulphate crystal is deemed a chemical change.
