During electrolysis of aqueous `CuBr_(2)` using `Pt` electrode,

Options

A. `Br_(2)` gas is evolved at the anode
B. `Cu(s)` is deposited at the cathode
C. `Br_(2)` gas is evolved at anode and `H_(2)` gas at cathode
D. `H_(2)` gas is evolved at anode.

Answer

A, B

Explanation

(A,B) at cathode:
`Cu^(2+)+2e^(-)toCu(s)`
`underline(2Br^(-)+toBr_(2)2e^(-))`
`Cu^(2+)+2Br^(-)toBr_(2)+Cu(s)`.