CAIE IGCSE Chemistry Clean Dry Air Composition
Practise recalling the approximate percentage composition of clean dry air and identifying nitrogen, oxygen, noble gases and carbon dioxide correctly.
- Syllabus
- 2026–2028
- Course
- Chemistry 0620
Exam points
- state that clean dry air contains approximately 78 percent nitrogen and 21 percent oxygen
- identify most of the remainder as noble gases, especially argon, with a small carbon dioxide fraction
- distinguish elements in air from carbon dioxide as a compound when interpreting tables
10.3.1—Composition of clean, dry air as question 1
[Maximum number: 1]
This question is about gases found in clean, dry air and gases found in polluted air.
State the percentage of nitrogen in clean, dry air.
78 (\%)
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