Oxides of nitrogen, for example $\text{NO}$ and $\text{NO}_2$, are produced in the petrol engines of cars. Reactions in the car’s catalytic converter remove them from the exhaust gases. Which row explains how oxides of nitrogen are formed in a petrol engine and gives a reaction that occurs in the catalytic converter?
- Aformed by the reaction between nitrogen and oxygen from the air; $2\text{NO} + 2\text{CO} \rightarrow \text{N}_2 + 2\text{CO}_2$
- Bformed by the reaction between nitrogen and oxygen from the air; $2\text{NO} + 2\text{H}_2 \rightarrow \text{N}_2 + 2\text{H}_2\text{O}$
- Cformed by the reaction between nitrogen compounds in petrol and oxygen from the air; $2\text{NO} + 2\text{CO} \rightarrow \text{N}_2 + 2\text{CO}_2$
- Dformed by the reaction between nitrogen compounds in petrol and oxygen from the air; $2\text{NO} + 2\text{H}_2 \rightarrow \text{N}_2 + 2\text{H}_2\text{O}$