Chemistry · Oct / Nov 2016 · Paper 11 · Question 22
The diagram shows the apparatus used to extract aluminium from aluminium oxide. Which statement about this process is correct?
- AThe electrolyte is a solid mixture of aluminium oxide and cryolite.
- BThe electrolyte is aluminium oxide dissolved in water.
- CThe equation for the reaction at the positive electrode is Al³⁺ + 3e⁻ → Al.
- DThe positive carbon electrodes lose mass during the process and need regular replacement.
As printed in the paper
Show the answer
Correct answer: D. The positive carbon electrodes lose mass during the process and need regular replacement.
Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.