CAIE IGCSE Chemistry 9.5.3 Barrier Methods Prevent Rusting By Questions
Work through real CAIE IGCSE Chemistry questions to explain how coatings and zinc protect iron from rusting.
- Syllabus
- 2026–2028
- Course
- Chemistry 0620
Exam points
- explain how painting and other coatings prevent water and oxygen reaching iron
- explain sacrificial and barrier protection using zinc coatings
- interpret rusting experiments involving paint and changes in water level
- explain how insoluble surface products can stop further rusting
CAIE IGCSE Chemistry 9.5.3 Barrier Methods Prevent Rusting By Questions question 1
[Maximum number: 1]
Iron rusts in the presence of oxygen and water.
Which statements about the rusting of iron are correct?
1 Anhydrous iron(II) oxide is produced when iron rusts.
2 Iron rusts more quickly when attached to a piece of zinc.
3 Coating the iron with plastic prevents the iron from rusting.
4 Iron loses electrons when it rusts.
A
1 and 2
B
1 and 4
C
2 and 3
D
3 and 4
D
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