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CAIE IGCSE Chemistry 10.3.1 Composition of Clean Dry Air As Questions

Work through real CAIE IGCSE Chemistry questions to recall clean dry air percentages, identify its gases and calculate missing composition data.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • state the approximate composition of clean dry air as 78% nitrogen, 21% oxygen and about 1% other gases
  • identify nitrogen, oxygen, argon and carbon dioxide in air-composition questions
  • use air-composition data to calculate an unknown gas percentage or infer the remaining volume

CAIE IGCSE Chemistry 10.3.1 Composition of Clean Dry Air As Questions question 1

[Maximum number: 1]

The apparatus shown is set up and left for a week.

Figure for Question CAIE IGCSE Chemistry 10.3.1 Composition of Clean Dry Air As Questions question 1 — CAIE IGCSE Chemistry

Which diagram shows the level of the water at the end of the week?

A

See water-level diagram A in the official apparatus figure.

B

See water-level diagram B in the official apparatus figure.

C

See water-level diagram C in the official apparatus figure.

D

See water-level diagram D in the official apparatus figure.

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