ConceptConceptDocsDocuments

CAIE IGCSE Chemistry Air Pollutant Sources

Practise matching carbon oxides, methane, nitrogen oxides, sulfur dioxide and particulates to combustion, engines, decay, digestion or sulfur 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

10.3.2—Air pollutant sources: CO2 from question 1

[Maximum number: 1]

Petroleum is a useful natural resource.

The diagram shows how petroleum can be separated into useful substances.

Figure for Question 10.3.2—Air pollutant sources: CO2 from question 1 — CAIE IGCSE Chemistry

Refinery gas is a mixture of hydrocarbons.

One refinery gas is butane, C4H10\mathrm{C}_{4} \mathrm{H}_{10}.

Name the toxic gas produced by the incomplete combustion of butane.

All question bank results loaded