passwella.
Menu

JAMB Chemistry 1984 Question 47

Question 47

Metals and their Compounds

Which of the following electrodes is used in electrolysis of bauxite (Al2O3) in molten cryolite?

  1. A.Steel electrodes
  2. B.Carbon electrodes
  3. C.Mercury electrodes
  4. D.Carbon anode and steel cathode
  5. E.Carbon cathode and steel anode.
Show the answer and explanation

Answer: B (Carbon electrodes)

Explanation

In aluminium extraction both the anode (carbon blocks) and the cathode (the carbon lining of the cell) are carbon.