JAMB - Chemistry (1982 - No. 7)
The product formed at the the cathode during the electrolysis of sodium chloride solution with carbon electrodes is?
sodium
chlorine
hydrogen
sodium hydroxide
oxygen
Explication
During the electrolysis of NaCl using carbon electrodes, hydrogen is usually deposited at the cathode because hydrogen is less reactive and lower than sodium in the electrochemical series(sodium and hydrogen are the two cations in the solution)