During the electrolysis of sodium Chloride solution, hydrogen is discharged at the carbon cathode because
-
A.
hydrogen ions are in greater concentration than sodium ions. -
B.
hydrogen is higher than sodium in the electrochemical series. -
C.
hydrogen is lower than sodium in the electrochemical series. -
D.
of the nature of the electrodes. -
E.
the concentration of sodium ions is greater than that of the hydrogen ion in the electrolyte.