Question detail
Why is aluminium extracted by electrolysis rather than reduction with carbon?
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. Aluminium is more reactive than carbon.
- B. Aluminium is less dense than carbon.
- C. Aluminium has a lower melting point than carbon.
- D. Aluminium is a better conductor than carbon.
Answer
Aluminium is more reactive than carbon.
Explanation
Aluminium is more reactive than carbon, making it difficult to reduce aluminium oxide using carbon.
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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