Corrosion of metals: past paper questions
Real questions on corrosion of metals
The newest 20 of 20 written questions. Open one to see it on the real paper.
- 0971/42 · October/November 2024 · Q2e[1]
State why aluminium is used in food containers.
See it on the paper → - 0971/31 · May/June 2024 · Q7b(i)[2]
State the conditions needed for iron to rust.
See it on the paper → - 0971/31 · May/June 2024 · Q7b(ii)[1]
Rust is hydrated iron( III ) oxide. State if iron( III ) oxide is an acidic or basic oxide. Give a reason for your answer.
See it on the paper → - 0971/31 · May/June 2024 · Q7b(iii)[1]
Complete this sentence about methods of preventing rusting. Rusting can be prevented by painting or
See it on the paper → - 0971/32 · May/June 2024 · Q7b(i)[1]
State in which test-tube, M, N, O or P, the iron nail is most likely to rust.
See it on the paper → - 0971/32 · May/June 2024 · Q7b(ii)[1]
Choose from the list the compound in rust. Tick (✓) one box. anhydrous iron( III ) oxide anhydrous iron( III ) sulfate hydrated iron( III ) chloride hydrated iron( III ) oxide
See it on the paper → - 0971/41 · May/June 2024 · Q6c(i)[1]
Name the process used to coat iron with zinc as a method of rust prevention.
See it on the paper → - 0971/32 · October/November 2023 · Q5c(ii)[1]
Give one reason for using stainless steel instead of pure iron for cutlery.
See it on the paper → - 0971/42 · October/November 2023 · Q3e[1]
Preventing the rusting of steel is important. State the chemical name of rust.
See it on the paper → - 0971/42 · October/November 2023 · Q3f(i)[1]
State the term used for coating steel with zinc.
See it on the paper → - 0971/42 · October/November 2023 · Q3f(ii)[1]
Describe another barrier method for preventing rusting.
See it on the paper → - 0971/42 · October/November 2023 · Q3f(iii)[2]
Explain how zinc provides sacrificial protection. [Total: 17]
See it on the paper → - 0971/32 · May/June 2023 · Q5b[1]
Iron rusts in the presence of oxygen and water. State one method of preventing rusting.
See it on the paper → - 0971/32 · October/November 2021 · Q3d(ii)[1]
Describe one advantage of stainless steel compared with pure iron.
See it on the paper → - 0971/32 · October/November 2021 · Q3g[2]
Iron rusts. Name the two substances needed for iron to rust. [Total: 15]
See it on the paper → - 0971/42 · October/November 2020 · Q3d(i)[1]
Name this process of coating iron objects with a layer of zinc.
See it on the paper → - 0971/42 · October/November 2020 · Q3d(ii)[1]
Explain how completely coating an iron object with a layer of zinc prevents rusting.
See it on the paper → - 0971/31 · May/June 2020 · Q6d[2]
Rust contains compounds of iron. State two conditions needed for iron to rust.
See it on the paper → - 0971/32 · May/June 2020 · Q6e[2]
Rust contains hydrated iron( III ) oxide. Describe and explain one method of preventing iron from rusting. [Total: 11]
See it on the paper → - 0971/61 · May/June 2019 · Q4[6]
Steel nails rust in the presence of air and water. Plan an investigation to: ● ● ● show that coating steel nails with paint helps to protect the nails from rusting show that coating steel nails with zinc helps to protect the nails from rusting determine which coating is more effective at protecting steel nails from rus...
See it on the paper →
What examiners said
Galvanising was widely known as the name of the process in which iron is coated in zinc.
— Examiner report, October/November 2020, 0971/42 Q3(d)(i) (Cambridge)
Most candidates talked about sacrificial methods of rust protection rather than the obvious barrier to water / oxygen that a complete layer on the surface of the iron would afford.
— Examiner report, October/November 2020, 0971/42 Q3(d)(ii) (Cambridge)
The full range of marks was seen for this question. A number of candidates spent time explaining, often in detail, how to paint the nails or electroplate nails with zinc, despite being informed that coated nails were already provided. Many answers showed a lack of detail with vague statements such as ‘add the nails to water’ with no idea of any suitable container or quantity of nails or mass of n...
— Examiner report, May/June 2019, 0971/61 Q4 (Cambridge)
Past papers, syllabus and examiner reports © UCLES (Cambridge University Press & Assessment). Questions are matched to topics from the official syllabus. AssessPro is independent and not endorsed by Cambridge.