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CAIE IGCSE Chemistry 9.5.1 Conditions Required for the Rusting of Questions

Work through real CAIE IGCSE Chemistry questions to identify rusting conditions and explain hydrated iron(III) oxide formation.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • state that rust is hydrated iron(III) oxide
  • identify oxygen and water as the substances needed for iron to rust
  • interpret rusting experiments and identify conditions that permit corrosion
  • write a word equation for rust formation and distinguish corrosion-prevention methods

CAIE IGCSE Chemistry 9.5.1 Conditions Required for the Rusting of Questions question 1

[Maximum number: 1]

The diagrams show experiments to investigate rusting of iron nails.

Figure for Question CAIE IGCSE Chemistry 9.5.1 Conditions Required for the Rusting of Questions question 1 — CAIE IGCSE Chemistry

In which test-tubes do the nails rust?

A

1, 2 and 3

B

1 and 2 only

C

1 and 3 only

D

1 only

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