Chemistry 9701 · AS & A Level · Nitrogen and sulfur

Nitrogen and sulfur — practice question

Nitrogen monoxide, NO, is a primary pollutant formed by petrol engines and present in their exhaust gases. Which reaction takes place in a catalytic converter and lowers the emission of nitrogen monoxide?

  • A$\text{NO(g)} + \text{CO(g)} \rightarrow \text{NO}_2\text{(g)} + \text{C(s)}$
  • B$\text{NO(g)} + \text{CO}_2\text{(g)} \rightarrow \text{NO}_2\text{(g)} + \text{CO(g)}$
  • C$2\text{NO(g)} + 2\text{CO(g)} \rightarrow \text{N}_2\text{(g)} + 2\text{CO}_2\text{(g)}$
  • D$2\text{NO(g)} + \text{CO}_2\text{(g)} \rightarrow 2\text{NO}_2\text{(g)} + \text{C(s)}$

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