10. Which of the following is an illustration of metallurgical electrochemical principles? a) Baeyer’s process b) Solvay process c) Bergius process d) Hall-Heroult process
Answer: d Explanation: The Hall-Heroult process reduces bauxite to virtually pure aluminium by an electrochemical reaction. The bauxite is dissolved in a molten electrolyte containing sodium, fluorine, and aluminium and kept at a high temperature. Aluminium is deposited at the cathode and oxygen gas is produced at the anode in this process.
