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When a metal sulphate is heated in dry test tube, the colour changes from blue to white. Then metal sulphate may be :

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When a metal sulphate is heated in dry test tube, the colour changes from blue to white. Then metal sulphate may be :

(A) BaSO4 

(B) CuSO4.5H2O

(C) Na2SO4 

(D)None of these

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Correct Answer is: (B) CuSO4.5H2O

CuSO4.5H2O  CuSO4 (due to no crystal field splitting)

Blue                               White

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