The correct statement about the electrolysis of an aqueous solution of with Ag electrode is:
| 1. | Ag+ ion gets oxidised at cathode; Ag(s) is reduced at anode. |
| 2. | H2O gets reduced at cathode; H2O gets oxidised at anode. |
| 3. | Ag+ ion gets reduced at cathode; H2O is oxidised at anode. |
| 4. | Ag+ ion gets reduced at cathode; Ag(s) is oxidised at anode. |
From the following, identify the reaction having the top position in the EMF series (standard reduction potential) according to their electrode potential at 298 K.
| 1. | Mg2++ 2e– → Mg(s) | 2. | Fe2+ + 2e– → Fe(s) |
| 3. | Au3++ 3e– → Au(s) | 4. | K++ 1e – → K(s) |