When an aqueous solution of `AgNO_3` is electroysed between platinum electrodes, the substances liberted at anode and cathode are

Options

A. silver is deposited at cathode and `O_2` is liberated at anode
B. silver is deposited at cathode and `H_2` is liberated at anode
C. hydrogen is liberted at cathode and `O_2` is liberated at anode.
D. silver is deposited at cathode and Pt is dissolved in electrolyte.

Answer

A

Explanation

`{:("At cathode",Ag_((aq))^(+)+e^(-) to Ag_((s))),("At anode:",2OH_((aq))^(-) to 1/2O_(2(g))+H_2O_((l))+2e^(-)):}`