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CAIE IGCSE Chemistry 10.3.2 Air Pollutant Sources Co2 From Questions

Work through real CAIE IGCSE Chemistry questions to link air pollutants with combustion, engines, decay, digestion and sulfur-containing fuels.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • link complete combustion to carbon dioxide and incomplete combustion to carbon monoxide or soot
  • link methane to decaying vegetation, landfill, animal digestion or waste decomposition
  • link nitrogen oxides to hot engines and sulfur dioxide to sulfur-containing fuels or ores
  • interpret carbon-cycle and greenhouse-gas processes that increase or reduce atmospheric carbon dioxide

CAIE IGCSE Chemistry 10.3.2 Air Pollutant Sources Co2 From Questions question 1

[Maximum number: 1]

Which element has an oxide that is used as a food preservative?

A

helium

B

hydrogen

C

iron

D

sulfur

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