Chemistry 0620 · IGCSE · Air quality and climate

Air quality and climate — practice question

Petrol burns in a car engine, producing waste gases that exit through the car exhaust. One of these waste gases is an oxide of nitrogen. Which statement explains how this oxide of nitrogen is formed?

  • ACarbon dioxide reacts with nitrogen in the catalytic converter.
  • BNitrogen reacts with oxygen in the car engine.
  • CNitrogen reacts with oxygen in the catalytic converter.
  • DPetrol combines with nitrogen in the car engine.

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