Question detail
What is produced at the cathode during the electrolysis of molten aluminium oxide?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Electrolysis
Question
- A. Oxygen gas.
- B. Aluminium metal.
- C. Carbon dioxide.
- D. Cryolite.
Answer
Aluminium metal.
Explanation
At the cathode, aluminium ions gain electrons to form aluminium metal.
Common mistake
Misunderstanding Anode Consumption
Students often think that carbon anodes are used up because they react with the aluminium being extracted, rather than understanding that they are consumed by reacting with oxygen produced during the electrolysis process.
Emphasize that carbon anodes are gradually used up due to the reaction with oxygen, forming carbon dioxide, rather than being consumed by the aluminium itself.
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