Explain why blue colour of `CuSO_(4)` solution is discharged when Zn rod is dipped in it.

Explanation

This is because Zn rod undergoes oxidation and the electrons lost are gained by `Cu^(2+)` ions forming copper solid.
`Zn+CuSO_(4)toZnSO_(4)+Cu`
Therefore concentration of `Cu^(2+)` ions goes on decreasing, .blue colour of `CuSO_(4)` solution is discharged.