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Question

On reaction with sulphuric acid, the copper sulphate crystals turn .

A
blue
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B
red
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C
white
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D
yellow
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Solution

The correct options are
A blue
C white
The blue colour of copper sulphate crystal is due to the presence of water of crystallisation.

Sulphuric acid being a dehydrating agent remove away the water of crystallisation. Thus, leaving behind a white crystal of copper sulphate.

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