Electrolysis of bauxite is done by ?
Correct answer: D. Hall-Heroult Process
- A. Haber's Process
- B. Born-Haber cycle
- C. Ion Exchange Method
- D. Hall-Heroult Process
Explanation
The electrolysis of bauxite is done by the Hall-Heroult process. This process is named after Charles Martin Hall and Paul L. Heroult, who independently developed it in 1886. The Hall-Heroult process involves the electrolysis of a molten mixture of alumina (Al2O3) and cryolite (Na3AlF6). The cryolite lowers the melting point of the alumina, making it easier to electrolyze. During the electrolysis, the alumina is broken down into aluminum ions (Al3+) and oxide ions (O2-). The aluminum ions are attracted to the cathode, where they gain electrons and form molten aluminum. The oxide ions are attracted to the anode, where they lose electrons and form oxygen gas. The Hall-Heroult process is a very energy-intensive process, but it is the most common method used to extract aluminum from bauxite.
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