Chemistry 0620 · IGCSE · Redox

Redox — practice question

The reactions illustrated can take place in the air during a thunderstorm. $\text{N}_2 + \text{O}_2 \rightarrow 2\text{NO}$ $2\text{NO} + \text{O}_2 \rightarrow 2\text{NO}_2$ $\text{NO} + \text{O}_3 \rightarrow \text{NO}_2 + \text{O}_2$ Which row indicates what happens to the reactant molecules in each of these reactions?

  • AN$_2$: oxidised; NO: oxidised; O$_3$: oxidised
  • BN$_2$: oxidised; NO: oxidised; O$_3$: reduced
  • CN$_2$: reduced; NO: reduced; O$_3$: oxidised
  • DN$_2$: reduced; NO: reduced; O$_3$: reduced

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