Two aqueous solutions A and B containing solute `CuSO_(4)` and `NaBr` respectively were electrolysed using platinum electrodes. The `pH` of the resultins will show `a//an :`

Options

A. increase
B. remains unchanged
C. decrease
D. increase or decrease depending on the strength of the current

Answer

C

Explanation

Cathode :` Cu^(2+) (aq) + 2e^(-) to Cu (s)`

Since there is increase in `H^+` , pH will decrease.