Chemistry 0620 · IGCSE · Electrolysis

Electrolysis — practice question

Aluminium is obtained from aluminium oxide by electrolysis. Carbon dioxide is produced in this process. Which equation represents the production of carbon dioxide during the extraction of aluminium from aluminium oxide by electrolysis?

  • A$\text{Al}_2(\text{CO}_3)_3 \rightarrow \text{Al}_2\text{O}_3 + 3\text{CO}_2$
  • B$\text{Al}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Al} + 3\text{CO}_2$
  • C$\text{C} + \text{O}_2 \rightarrow \text{CO}_2$
  • D$\text{C}^{4+} + 2\text{O}^{2-} \rightarrow \text{CO}_2$

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