A-LevelChemistryElectrochemistry9701/12 · Oct/Nov 2018 · Q331 Mark

Aqueous iron(II) sulfate can take part in redox reactions. 6FeSO4 + 7H2SO4 + Na2Cr2O7 → 3Fe2(SO4)3 + Cr2(SO4)3 + Na2SO4 + 7H2O Which redox changes occur during this reaction? 1 Fe(II) is oxidised to Fe(III). 2 Cr(VI) is reduced to Cr(III). 3 Oxygen is reduced to water.

A1, 2 and 3 are correct

B1 and 2 only are correct

C2 and 3 only are correct

D1 only is correct

✓ Correct answer

B: 1 and 2 only are correct

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Topic: Electrochemistry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2018 Paper 1 Variant 2, question 33.

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