During the extraction of aluminium by Hall-He'roult process, (i) Write a neat labeled diagram of the electrolytic cell. (ii) Write over all cell reaction. (iii) At which electrode oxygen gas is liberated?

Engineering

Chemistry

Electrolysis

Faraday Law

Extraction of Iron and Copper

Question

During the extraction of aluminium by Hall-He'roult process,
(i) Write a neat labeled diagram of the electrolytic cell.
(ii) Write over all cell reaction.
(iii) At which electrode oxygen gas is liberated?

LiveFree JEE Main Previous Year Online Papers Live Free JEE Advance Previous Year Online Papers

College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

During the extraction of aluminium by Hall-He'roult process,
(i) Neat labelled diagram of electrolytic cell is as shown.
(ii) Over all cell reaction is $2 {Al}_{2} O_{3} + 3 C \to 4 \overset{∙ ∙}{Al} + 3 {CO}_{2}$ .

(iii) At anode oxygen gas is liberated.

C + O^2– → CO + 2e^–
C + 2O^2– → CO₂ + 4e^–
At cathode, Al is obtained.
Al³⁺ + 3e^– → Al