Can you explain ELECTROCHEMICALSERIESand SELECTIVEDISCHARGE in details.....Im very much confusd......plzz help fast

Electrochemical series is the arrangement of various elements in increasing order of their reducing power. This means that the element with high reducing power will be placed at the top. As we move down the electrochemical series the reducing power of the elements decreases and the oxidising power increases. As a result the elements placed higher in the electrochemical series will be readily oxidised by elements placed lower in the electrochemical series and, the elements placed lower in the electrochemical series will be readily reduced by the elements placed higher in the series.

Selective discharge of the ions implies, that during electrolysis, if more than one reduction reaction at cathode, and oxidation reaction at anode can occur, then the cation which has high reducing power (placed higher in the electrochemical series) will be reduced at cathode, on the other hand, the anion which has lower reducing power (placed lower in the electrochemical series) will be oxidized at anode.