Inside a car’s exhaust system, in a catalytic converter, carbon monoxide is oxidised to carbon dioxide, while nitrogen monoxide is reduced to nitrogen. What are the oxidation number changes for carbon and nitrogen in these two reactions?
- Acarbon $-2$, nitrogen $+2$
- Bcarbon $-1$, nitrogen $+1$
- Ccarbon $+1$, nitrogen $-1$
- Dcarbon $+2$, nitrogen $-2$