Question detail
What is produced at the anode during the electrolysis of 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. Aluminium
- B. Oxygen
- C. Hydrogen
- D. Carbon dioxide
Answer
Oxygen
Explanation
At the anode, oxide ions lose electrons to form oxygen gas during the electrolysis of aluminium oxide.
Common mistake
Aluminium ions are reduced to aluminium metal at the anode
Students often think that aluminium ions gain electrons at the anode, so aluminium metal is produced there
Aluminium ions (Al³⁺) are reduced at the cathode, where they gain three electrons to form aluminium metal (Al). The anode is where oxidation occurs, so oxygen gas is produced from oxide ions.
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