MCQEasy1 mark
1
Choose the correct answers to the questions from the given options. (Do not copy the questions, write the correct answers only.)
In the electrolysis of molten aluminium oxide for extraction of aluminium, the following reactions take place: Al³⁺ + 3e⁻ → Al 2O²⁻ → O₂ + 4e⁻ C + O₂ → CO₂ Al₂O₃ ⇌ 2Al³⁺ + 3O²⁻ The reaction that takes place at the negative electrode is:
Topic: Electrolysis, electrolytes and electrode processes
Previous-year question practice database
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Answer
Exam answer
(a) Reaction 1: Al³⁺ + 3e⁻ → Al.
Explanation
Reduction of Al³⁺ occurs at the negative electrode (cathode).
In words
Reaction 1: Al³⁺ + 3e⁻ → Al.
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