When an aqueous solution of AgNO3 is electrolysed between platinum electrodes, which of the following is true?
At anode:
Since, Pt electrode are inert, it does not involve in redox reaction of cell.
Therefore, OH− or NO−3 ions can be oxidized at anode.
But OH− ions having higher oxidation potential, therefore they get oxidised to O2
NO−3 can't be further oxidised because already nitrogen attains its highest oxidation state (+5).
Anode reaction:
2H2O(l)⇌4H+(aq)+O2(g)+4e−
Hence, option (a) is correct.