When water was added to a white anhydrous substance X, the colour changed to blue. X is
-
\(CuSO_{4}\)
- \(FeSO_{4}\)
- \(Na_{2}SO_{4}\)
- \(PbSO_{4}\)
The correct answer is: 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.