Question

it is necessary to remove the carbon rods frequently during the electrolysis of alumina why ​

Answer 1

Answer: (1) During electrolysis of alumina, the oxygen liberated at the carbon anode reacts with graphite rods (carbon anode) and forms carbon dioxide. (2) As the anodes gets oxidised during electrolysis of alumina, they are continuously eroded. Hence, it is necessary to replace anodes from time to time.