Water of crystallisation is the

Water required for crystallization

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Number of water molecules present in one formula unit of a salt.

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Crystals present in one molecule of water

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Minimum amount of water required for crystallization

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Solution

The correct option is B
Number of water molecules present in one formula unit of a salt.

The water of crystallization is the fixed number of water molecules present in one formula unit of a salt.
Eg. Five water molecules are present in one formula unit of copper sulphate. The chemical formula for hydrated copper sulphate is Cu SO4. 5H2O.

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Similar questions

C u {S O}_{4}

5 H_{2} O

{N a}_{2} {C O}_{3}

10 H_{2} O

C a {S O}_{4}

2 H_{2} O

How many molecules of water of crystallisation (per formula unit) are present in :

(a) copper sulphate crystals ?

(b) washing soda ?

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