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CAIE A-Level Chemistry AS 14.1.6 Combustion Pollutants and Catalysts Questions

Practise identifying carbon monoxide, nitrogen oxides and unburnt hydrocarbons, explaining their hazards and environmental effects, and describing catalytic-converter removal in CAIE 9701 questions.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • identify carbon monoxide, nitrogen oxides and unburnt hydrocarbons as combustion pollutants from internal-combustion engines
  • explain environmental or health consequences such as toxicity, acid rain, photochemical smog and global dimming
  • describe how catalytic converters remove pollutants through oxidation and reduction reactions on the catalyst surface

CAIE A-Level Chemistry AS 14.1.6 Combustion Pollutants and Catalysts Questions question 1

[Maximum number: 1]

A catalytic converter reduces the amount of pollutants in the fumes from a car exhaust.
Which row identifies a pollutant and shows how it is removed by the action of the catalyst?

pollutant

chemical removal

carbon dioxide

reduced to carbon

carbon monoxide

oxidised to carbon dioxide

oxides of nitrogen

oxidised to nitric acid

unburnt hydrocarbons

oxidised to carbon dioxide and hydrogen

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