CAIE A-Level Chemistry AS 12.1.4 Atmospheric Nox and Photochemical Smog Questions
Practise explaining how NO and NO2 react with unburned hydrocarbons to form PAN in photochemical smog.
- Syllabus
- 2028–2030
- Course
- Chemistry 9701
- Level
- AS
Exam points
- Identify NO and NO₂ with unburned hydrocarbons as the pollutant pair involved in PAN formation.
- Explain that these pollutants react to form peroxyacetyl nitrate (PAN), and identify PAN as a component of photochemical smog.
CAIE A-Level Chemistry AS 12.1.4 Atmospheric Nox and Photochemical Smog Questions question 1
[Maximum number: 1]
Photochemical smog is a type of air pollution produced in urban areas by the effect of sunlight on substances released from vehicle exhausts.
Which mixture of primary pollutants leads to the formation of photochemical smog?
A
carbon dioxide and water vapour
B
carbon monoxide and unburnt hydrocarbons
C
nitrogen oxide and unburnt hydrocarbons
D
sulfur dioxide and water vapour
C
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