Nitrogen(II) oxide, $\text{NO}$, nitrogen(IV) oxide, $\text{NO}_2$, carbon monoxide, $\text{CO}$, and unburnt hydrocarbons are found in the exhaust gases of internal combustion engines. When catalytic converters are used to remove these compounds from the exhaust gases, redox reactions take place. What change does each compound undergo in the catalytic converter?
- A$\text{NO}$ oxidised; $\text{NO}_2$ oxidised; $\text{CO}$ reduced; hydrocarbons oxidised
- B$\text{NO}$ oxidised; $\text{NO}_2$ oxidised; $\text{CO}$ oxidised; hydrocarbons oxidised
- C$\text{NO}$ reduced; $\text{NO}_2$ reduced; $\text{CO}$ oxidised; hydrocarbons oxidised
- D$\text{NO}$ reduced; $\text{NO}_2$ reduced; $\text{CO}$ reduced; hydrocarbons reduced