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Question

The salts that have water of crystallisation are called:

A
dehydrated salts
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B
unhydrated salts
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C
hydrated salts
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D
water salts
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Solution

The correct option is C hydrated salts
The water of crystallization is water molecules that form an essential part of the crystal structure of some compounds.
They are responsible for the geometry and colour of the crystals.
The salts that have water of crystallization are called as hydrated salts.
For example, Glauber's salt (sodium sulphate decahydrate) Na2SO4.10H2O has 10 water of crystallization which are responsible for its monoclinic geometry and colourless crystals.
Hence, the correct answer is the option (C).

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