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Q.

Which of the following is the colour of copper sulphate solution? 


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a

Blue

b

Blue green

c

Yellow reddish

d

Yellow 

answer is A.

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Detailed Solution

Copper sulphate solution is blue in colour.
It is blue only in aqueous form so after adding copper sulphate in water it forms [Cu(H2O)]2+ ion which is the main reason for the blue colour of aqueous copper sulphate.The ionisation reaction for the above can be shown as follows:
CuSO4 + H2O → [Cu(H2O)]+2
 
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