Chemistry 0620 · IGCSE · Air quality and climate

Air quality and climate — practice question

Certain combustion reactions give off pollutant gases. Which of the reactions form a pollutant gas that is absent from clean air?

  • A1 and 3
  • B1 and 4
  • C2 and 3
  • D3 and 4

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI