When water was added to a white anhydrous substance X, the colour changed to blue. X is
-
A.
(CuSO_{4}) -
B.
(FeSO_{4}) -
C.
(Na_{2}SO_{4}) -
D.
(PbSO_{4})
Correct Answer: Option A
Explanation
When water is added to white coloured anhydrous copper sulphate, its colour changes to blue, indicating that the blue coloured copper sulphate pentahydrate is regenerated.