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प्रश्न
Define the following term:
Efflorescence
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उत्तर
It is the phenomenon by which hydrated salts, on exposure to dry air, lose their water of crystallization and crumble to powder.
संबंधित प्रश्न
Name three chemicals made from common salt (or sodium chloride).
Name the raw material used for the production of caustic soda.
How would you show that blue copper sulphate crystals contain water of crystallisation?
What happens when a few drops of water are added to anhydrous copper sulphate? Explain with the help of an equation.
Why is the electrolysis of a concentrated solution of sodium chloride known as chlor-alkali process?
Give the names and formulae of any two salts. Also name the acids and bases from which these salt may be obtained.
What will be the colour of litmus in an aqueous solution of ammonium chloride salt?
Give one example of a salt which gives an aqueous solution having:
pH less than 7
Consider the following salts:
Na2CO3, NaCl, NH4Cl, CH3COONa, K2SO4, (NH4)2SO4
Which of salts will give:
acidic solutions?
Write the name and formula of one salt each which contains:
two molecules of water of crystallisation
How many molecules of water of crystallisation (per formula unit) are present in:
copper sulphate crystals?
name two salts which are neutral, when dissolved in water.
Define the following term:
Hygroscopy
Define the following term:
Water of crystallization
Fill in the blank
___________ is the phenomenon by which hydrated salts on exposure to dry air, lose their water of crystallization and crumble to powder.
Name two carbonates which do not produce carbon dioxide on heating.
Name a colourless gas which bleaches.
Salt which is formed by the partial replacement of hydrogen ions of an acid by a metal is called ______.
Select the correct answer from A, B, C, D and E.
A compound which in the aqueous solution state, is neutral in nature.
