Chemistry 0620 · IGCSE · Redox

Redox — practice question

When aqueous iron(II) sulfate is added to acidified potassium manganate(VII), the purple colour of the potassium manganate(VII) is lost. When aqueous potassium iodide is added to acidified potassium dichromate(VI), a dark brown solution is produced. Which row correctly shows the function of the iron(II) sulfate and the potassium dichromate(VI) in these reactions?

  • Airon(II) sulfate: oxidising agent; potassium dichromate(VI): oxidising agent
  • Biron(II) sulfate: oxidising agent; potassium dichromate(VI): reducing agent
  • Ciron(II) sulfate: reducing agent; potassium dichromate(VI): reducing agent
  • Diron(II) sulfate: reducing agent; potassium dichromate(VI): oxidising agent

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