CAIE IGCSE Chemistry 10.3.8 How oxides of nitrogen form in car
Practise explaining nitrogen oxide formation in engines and how catalytic converters remove NOx using carbon monoxide reactions.
- Syllabus
- 2026–2028
- Course
- Chemistry 0620
Exam points
- explain that nitrogen and oxygen from air react at high engine temperatures
- identify the catalytic converter as the exhaust equipment that removes NOx
- write or choose equations reducing NO or NO2 to N2 while CO forms CO2
10.3.8—How oxides of nitrogen form in car question 1
[Maximum number: 1]
This question is about gases found in clean, dry air and gases found in polluted air.
Nitrogen dioxide, NO2, is formed in car engines.
Name the equipment in a car exhaust used to remove the NO2 formed in car engines.
catalytic converter
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