Chemistry 0620 · IGCSE · Hydrogen–oxygen fuel cells

Hydrogen–oxygen fuel cells — practice question

Which equation shows the reaction occurring in a hydrogen-oxygen fuel cell?

  • A$2\mathrm{H}_2 + \mathrm{O}_2 \rightarrow 2\mathrm{H}_2\mathrm{O}$
  • B$2\mathrm{H}_2 + 2\mathrm{O} \rightarrow 2\mathrm{H}_2\mathrm{O}$
  • C$2\mathrm{H}_2\mathrm{O} \rightarrow 2\mathrm{H}_2 + \mathrm{O}_2$
  • D$2\mathrm{H}_2\mathrm{O} \rightarrow 2\mathrm{H}_2 + 2\mathrm{O}$

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