Chemistry 0620 · IGCSE · Preparation of salts

Preparation of salts — practice question

Which equation shows one of the reactions that occurs in the Contact process?

  • A$2\mathrm{SO_2}(g) + \mathrm{O_2}(g) \rightleftharpoons 2\mathrm{SO_3}(g)$
  • B$2\mathrm{SO_2}(g) + \mathrm{O_2}(g) \rightleftharpoons 2\mathrm{SO_3}(aq)$
  • C$2\mathrm{SO_3}(g) + \mathrm{O_2}(g) \rightleftharpoons 2\mathrm{SO_4}(aq)$
  • D$2\mathrm{SO_3}(g) + \mathrm{O_2}(g) \rightleftharpoons 2\mathrm{SO_4}(g)$

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