MetallurgyHard
Question
During the electrolytic reduction of aluminium, the carbon anodes are replaced from time to time because:
Options
A.the carbon anodes get decayed
B.the carbon prevents atmospheric oxygen from coming in contact with aluminium
C.oxygen liberated at the carbon anodes reacts with anodes to form CO and CO2
D.carbon converts Al2O3 to Al
Solution
Cathode : Al3+ (melt) + 3e- → Al
Anode : C + O2- (melt) → CO + 2e- ; C + 2O2-(melt) CO2 + 4e-
Anode : C + O2- (melt) → CO + 2e- ; C + 2O2-(melt) CO2 + 4e-
Create a free account to view solution
View Solution FreeMore Metallurgy Questions
Calcination is the process of heating the ore:...For decolourisation of 1 mole of KMnO4, the moles of H2O2 required is :...Which one of the following processes involves the principle of fractional crystallisation for the refining of impure met...Which does not represent correct method ?...Extraction of metal from the ore cassiterite involves...