Click here to visit our brand new IMAT exam forums!

Find worked solutions for different exam papers, ask questions and connect with
medical aspirants and students from all over the world.

  • Creator
  • #25816

    Nicolas Sanchez

    Iron is extracted from iron ore (which contains Fe2O3) using carbon monoxide.
    This overall reaction is slow and so must be heated.
    The chemical equation for this reaction under certain conditions is shown below:

    Fe2O3 + 3CO → 2Fe + 3CO2 ∆H = -30kJ/mol

    Which one of the following statements about this process is correct?

    A. The iron ions in Fe2O3 lose electrons to become Fe.
    B. The oxide ions in Fe2O3 each have a charge of − 6.
    C. The Fe2O3 acts as an oxidising agent in this reaction.
    D. The reaction is an endothermic process.
    E. The reaction is an example of electrolysis

Sort by:
  • BMAT 2018 Section 2 Q10

  • Paris

    July 21, 2021 at 9:30 am
    Down Accepted answer

    The reaction is exothermic since it has a negative ΔH. The Fe ions with an oxidation number of +3 are reduced to neutral Fe atoms. Since Fe is reduced, it acts as the oxidising agent in this reaction.

    The answer is C.