TopicalChemistry (9-1) 0971MetalsCorrosion of metalsPaper 1

Corrosion of metals — Paper 1 · IGCSE Chemistry (9-1) 0971

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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Questions5 pages

Question 1: 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…Question 2: 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 c…Question 3: 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 w…1 / 5
Question 4: 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 we…Question 5: 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-tube…2 / 5
Question 6: 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-tube…Question 7: Iron can be electroplated with zinc to make it resistant to corrosion. Which row about electroplating iron with zinc is correct? positive e…Question 8: 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 …3 / 5
Question 9: 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 …Question 10: 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 onlyQuestion 11: Which compound is formed when iron rusts? A anhydrous iron(II) oxide B anhydrous iron(III) oxide C hydrated iron(III) hydroxide D hydrated …Question 12: Which gas in the air is needed for iron to rust? A argon B carbon dioxide C nitrogen D oxygenQuestion 13: Which word equation represents the rusting of iron? A iron + oxygen + water  anhydrous iron(II) hydroxide B iron + oxygen  hydrated iron(…4 / 5
Question 14: 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 tu…Question 15: The diagram shows iron nails which are left for one week in separate test-tubes with the conditions shown. rubber stopper oil iron nail iro…Question 16: Four methods to prevent the rusting of iron are listed. 1 alloying 2 coating with plastic 3 greasing 4 painting Which methods are barrier m…5 / 5

Mark scheme16 answers

Answers below. Sit the paper first if you are practising.

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Chemistry (9-1) 0971 · Corrosion of metals — Paper 1

IGCSE · topical answer key — answer key (teacher use)

Question

Answer

Marks

1C1
2C1
3D1
4B1
5B1
6B1
7D1
8B1
9C1
10A1
11D1
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13D1
14B1
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QuestionAnswerMarksFrom
1C10971/11 May/June 2018
2C10971/11 May/June 2019
3D10971/11 May/June 2019
4B10971/12 Oct/Nov 2019
5B10971/11 May/June 2020
6B10971/12 May/June 2020
7D10971/12 Oct/Nov 2021
8B10971/12 Oct/Nov 2021
9C10971/11 May/June 2022
10A10971/11 May/June 2023
11D10971/12 May/June 2023
12D10971/12 Oct/Nov 2023
13D10971/12 Oct/Nov 2024
14B10971/11 May/June 2025
15B10971/12 May/June 2025
16C10971/12 Oct/Nov 2025

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Questions as text

Q1 · A steel bicycle which had been left outdoors for several months was starting to rust 0971/11 May/June 2018

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

This question in 0971/11 May/June 2018

Q2 · Why is aluminium used to make containers for storing food? 0971/11 May/June 2019

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

This question in 0971/11 May/June 2019

Q3 · The diagram shows an experiment to investigate how paint affects the rusting of iron 0971/11 May/June 2019

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

This question in 0971/11 May/June 2019

Q4 · The apparatus shown is set up and left for a week 0971/12 Oct/Nov 2019

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

This question in 0971/12 Oct/Nov 2019

Q5 · The diagrams show experiments to investigate rusting of iron nails 0971/11 May/June 2020

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

This question in 0971/11 May/June 2020

Q6 · The diagrams show experiments to investigate rusting of iron nails 0971/12 May/June 2020

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

This question in 0971/12 May/June 2020

Q7 · Iron can be electroplated with zinc to make it resistant to corrosion 0971/12 Oct/Nov 2021

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

This question in 0971/12 Oct/Nov 2021

Q8 · Four different test-tubes containing water and an iron nail are left for two weeks 0971/12 Oct/Nov 2021

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

This question in 0971/12 Oct/Nov 2021

Q9 · Iron rusts when exposed to air 0971/11 May/June 2022

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

This question in 0971/11 May/June 2022

Q10 · Which substances in the air are needed for iron to rust? 0971/11 May/June 2023

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

This question in 0971/11 May/June 2023

Q11 · Which compound is formed when iron rusts? 0971/12 May/June 2023

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

This question in 0971/12 May/June 2023

Q12 · Which gas in the air is needed for iron to rust? 0971/12 Oct/Nov 2023

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

This question in 0971/12 Oct/Nov 2023

Q13 · Which word equation represents the rusting of iron? 0971/12 Oct/Nov 2024

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

This question in 0971/12 Oct/Nov 2024

Q14 · The diagram shows an experiment to investigate the corrosion of iron 0971/11 May/June 2025

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

This question in 0971/11 May/June 2025

Q15 · The diagram shows iron nails which are left for one week in separate test-tubes with the… 0971/12 May/June 2025

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

This question in 0971/12 May/June 2025

Q16 · Four methods to prevent the rusting of iron are listed 0971/12 Oct/Nov 2025

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

This question in 0971/12 Oct/Nov 2025