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Crystals of Salts

After heating...

Question

After heating, copper sulphate crystals turn :

A

green

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B

blue

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C

white

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D

black

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Solution

The correct option is C white
Copper sulphate crystals that seem to be dry contain water of crystallisation. When we heat the crystals, this water is removed and the salt turns white.
Thus, option $C$ is the correct option.

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