9.5· 16 questions · 16 marks · 19 min · 2018–2025· Multiple choice
Every Cambridge IGCSE Chemistry (9-1) Paper 1 question on corrosion of metals, laid out as 5 A4 pages with the mark scheme below. Nothing is left out. Free to read, no account.


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5 / 5Answers below. Sit the paper first if you are practising.
Pastlit
Chemistry (9-1) 0971 · Corrosion of metals — Paper 1
IGCSE · topical answer key — answer key (teacher use)
Question
Answer
Marks
| Question | Answer | Marks | From |
|---|---|---|---|
| 1 | C | 1 | 0971/11 May/June 2018 |
| 2 | C | 1 | 0971/11 May/June 2019 |
| 3 | D | 1 | 0971/11 May/June 2019 |
| 4 | B | 1 | 0971/12 Oct/Nov 2019 |
| 5 | B | 1 | 0971/11 May/June 2020 |
| 6 | B | 1 | 0971/12 May/June 2020 |
| 7 | D | 1 | 0971/12 Oct/Nov 2021 |
| 8 | B | 1 | 0971/12 Oct/Nov 2021 |
| 9 | C | 1 | 0971/11 May/June 2022 |
| 10 | A | 1 | 0971/11 May/June 2023 |
| 11 | D | 1 | 0971/12 May/June 2023 |
| 12 | D | 1 | 0971/12 Oct/Nov 2023 |
| 13 | D | 1 | 0971/12 Oct/Nov 2024 |
| 14 | B | 1 | 0971/11 May/June 2025 |
| 15 | B | 1 | 0971/12 May/June 2025 |
| 16 | C | 1 | 0971/12 Oct/Nov 2025 |
28 A steel bicycle which had been left outdoors for several months was starting to rust. What would not reduce the rate of corrosion? A Remove the rust and paint the bicycle. B Remove the rust and store the bicycle in a dry shed. C Remove the rust and wipe the bicycle with a clean, damp cloth. D Remove the rust and wipe the bicycle with an oily cloth.
1 marks
Answer: C
27 Why is aluminium used to make containers for storing food? A It conducts electricity. B It has a high melting point. C It is resistant to corrosion. D It is strong.
1 marks
Answer: C
30 The diagram shows an experiment to investigate how paint affects the rusting of iron. P Q iron painted iron air water What happens to the water level in tubes P and Q? tube P tube Q A falls rises B no change rises C rises falls D rises no change
1 marks
Answer: D
30 The apparatus shown is set up and left for a week. damp iron wool air water Which diagram shows the level of the water at the end of the week? A B C D
1 marks
Answer: B
30 The diagrams show experiments to investigate rusting of iron nails. 1 2 3 layer of oil tap salt boiled water water water In which test-tubes do the nails rust? A 1 only B 1 and 2 only C 1 and 3 only D 1, 2 and 3
1 marks
Answer: B
30 The diagrams show experiments to investigate rusting of iron nails. 1 2 3 layer of oil tap salt boiled water water water In which test-tubes do the nails rust? A 1 only B 1 and 2 only C 1 and 3 only D 1, 2 and 3
1 marks
Answer: B
10 Iron can be electroplated with zinc to make it resistant to corrosion. Which row about electroplating iron with zinc is correct? positive electrode negative electrode electrolyte (anode) (cathode) A iron zinc iron nitrate B iron zinc zinc nitrate C zinc iron iron nitrate D zinc iron zinc nitrate
1 marks
Answer: D
29 Four different test-tubes containing water and an iron nail are left for two weeks. Which nail showed the least amount of rusting? A B C D tap water boiled boiled tap water tap water tap water
1 marks
Answer: B
30 Iron rusts when exposed to air. Which two substances in air cause iron to rust? A carbon dioxide and oxygen B nitrogen and oxygen C oxygen and water D carbon dioxide and water
1 marks
Answer: C
27 Which substances in the air are needed for iron to rust? A oxygen and water B oxygen only C water and carbon dioxide D water only
1 marks
Answer: A
27 Which compound is formed when iron rusts? A anhydrous iron(II) oxide B anhydrous iron(III) oxide C hydrated iron(III) hydroxide D hydrated iron(III) oxide
1 marks
Answer: D
28 Which gas in the air is needed for iron to rust? A argon B carbon dioxide C nitrogen D oxygen
1 marks
Answer: D
26 Which word equation represents the rusting of iron? A iron + oxygen + water anhydrous iron(II) hydroxide B iron + oxygen hydrated iron(II) oxide C iron + oxygen + water anhydrous iron(III) hydroxide D iron + oxygen + water hydrated iron(III) oxide
1 marks
Answer: D
29 The diagram shows an experiment to investigate the corrosion of iron. P Q greased iron iron air water What happens to the water level in tubes P and Q? tube P tube Q A rises falls B no change rises C falls rises D no change no change
1 marks
Answer: B
28 The diagram shows iron nails which are left for one week in separate test-tubes with the conditions shown. rubber stopper oil iron nail iron nail iron nail water clean, dry air boiled water 1 2 3 Which test-tubes show evidence of rusting after one week? A 1 and 3 B 1 only C 2 and 3 D 2 only
1 marks
Answer: B
29 Four methods to prevent the rusting of iron are listed. 1 alloying 2 coating with plastic 3 greasing 4 painting Which methods are barrier methods? A 1, 2 and 3 B 1 and 4 C 2, 3 and 4 D 3 and 4 only
1 marks
Answer: C