A-LevelChemistryElectrochemistry9701/12 · Oct/Nov 2021 · Q101 Mark
In a catalytic converter in the exhaust system of a car, carbon monoxide is oxidised to carbon dioxide, and nitrogen monoxide is reduced to nitrogen. What are the changes in oxidation number of carbon and nitrogen in these two processes?
A-2 for carbon, +2 for nitrogen
B-1 for carbon, +1 for nitrogen
C+1 for carbon, -1 for nitrogen
D+2 for carbon, -2 for nitrogen
✓ Correct answer
D: +2 for carbon, -2 for nitrogen
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