February/March 2026 Paper 12

2026 · 40 questions · 40 parts · 40 marks

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24Atmospheric Chemistry Air PollutionMedium1 mark
The amount of each gas in the exhaust gases from an internal combustion engine is determined. The exhaust gases are then passed through the exhaust catalyst, known as a catalytic converter. Which statements about the effect of the catalytic converter are correct?
  1. 1
    The amount of nitrogen increases.
  2. 2
    The amount of carbon dioxide decreases.
  3. 3
    The amount of carbon monoxide does not change.