Corrosion of metals: past paper questions

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• Question 24Oct/Nov 2025, paper 11Multiple choice1 mark

  Some methods of preventing iron from rusting are listed. 1 alloying with chromium 2 greasing 3 painting Which methods are barrier methods?

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• Question 30Oct/Nov 2024, paper 11Multiple choice1 markHas a diagram

  The diagram shows an experiment to investigate how paint affects the rusting of iron. What happens to the water level in tubes S and T? | | tube S | tube T | |---|---|---| | A | falls | rises | | B | no change | rises | | C | rises | falls | | D | rises | no change |

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• Question 26Oct/Nov 2023, paper 11Multiple choice1 markHas a diagram

  Iron nails are stored in an airtight container. The nails begin to rust after a few days. How can the rusting of the nails be prevented?

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• Question 29May/June 2026, paper 13Multiple choice1 mark

  Which substances in the air are needed for iron to rust?

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• Question 29Oct/Nov 2025, paper 12Multiple choice1 mark

  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?

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• Question 26Oct/Nov 2024, paper 12Multiple choice1 mark

  Which word equation represents the rusting of iron?

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• Question 28Oct/Nov 2023, paper 12Multiple choice1 mark

  Which gas in the air is needed for iron to rust?

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• Question 27May/June 2026, paper 21Multiple choice1 mark

  Steel is an alloy of iron. Zinc is used to protect a steel car body from rusting. The steel body is completely coated in zinc.

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• Question 12Oct/Nov 2025, paper 13Multiple choice1 mark

  Which statements explain why metal objects are electroplated?

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• Question 23Oct/Nov 2024, paper 21Multiple choice1 mark

  Part of a steel ship is protected from rusting using a sacrificial metal. What is a suitable sacrificial metal?

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• Question 29Oct/Nov 2023, paper 13Multiple choice1 markHas a diagram

  The diagrams show experiments to investigate rusting of iron nails.

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• Question 4May/June 2026, paper 61Essay6 marks

  Iron nails rust slowly in the presence of water and air. When an iron nail rusts, insoluble solid hydrated iron(III) oxide forms. The solid hydrated iron(III) oxide falls off the iron nail.

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• Question 28Oct/Nov 2025, paper 21Multiple choice1 markHas a diagram

  Which row identifies methods used to prevent iron from rusting?

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• Question 25Oct/Nov 2024, paper 22Multiple choice1 mark

  Which statements about the use of sacrificial protection to prevent iron from rusting are correct?

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• Question 27Oct/Nov 2025, paper 22Multiple choice1 markHas a diagram

  An iron nail is fully covered with zinc to prevent it from rusting. Which row describes this method of protection and explains why zinc is used to protect the iron nail?

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• Question 11May/June 2024, paper 13Multiple choice1 markHas a diagram

  Iron water taps are often electroplated with a layer of chromium. Which statements explain why iron water taps are electroplated?

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• Question 6Oct/Nov 2025, paper 32Structured13 marks

  This question is about metals. Iron is extracted from its ore using carbon in a blast furnace. Aluminium is extracted from its ore using electrolysis.

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• Question 29May/June 2024, paper 13Multiple choice1 mark

  Which statement about the rusting of iron is correct?

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• Question 28Oct/Nov 2023, paper 22Multiple choice1 mark

  Which coating prevents iron from rusting even when the coating is damaged?

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• Question 29May/June 2025, paper 11Multiple choice1 markHas a diagram

  The diagram shows an experiment to investigate the corrosion of iron.

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• Question 31May/June 2024, paper 21Multiple choice1 markHas a diagram

  Iron rusts in the presence of oxygen and water. Which statements about the rusting of iron are correct?

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• Question 28May/June 2025, paper 12Multiple choice1 markHas a diagram

  The diagram shows iron nails which are left for one week in separate test-tubes with the conditions shown. Which test-tubes show evidence of rusting after one week?

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• Question 25May/June 2024, paper 22Multiple choice1 mark

  Metal X acts as a sacrificial metal to prevent iron from corroding. Metal X does not act as a sacrificial metal to prevent aluminium from corroding. What is X?

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• Question 3Oct/Nov 2023, paper 42Structured17 marks

  Iron is manufactured in a blast furnace. Three of the starting materials added to the blast furnace are coke, iron ore and limestone. Name the other starting material added to the blast furnace.

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• Question 29May/June 2025, paper 13Multiple choice1 mark

  What is the chemical name for rust?

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• Question 7May/June 2024, paper 31Structured11 marks

  Iron is a metal. Iron has a high density, a high melting point and a high boiling point. State three other physical properties of iron.

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• Question 5Oct/Nov 2023, paper 43Structured18 marksHas a diagram

  This question is about iron. Describe the bonding in a metallic element such as iron.

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• Question 29May/June 2025, paper 21Multiple choice1 mark

  Galvanising prevents iron from rusting. Which statements about galvanising are correct?

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• Question 7May/June 2024, paper 32Structured11 marksHas a diagram

  Iron and copper are transition elements. They are malleable and are good thermal and electrical conductors. State three other physical properties of iron.

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• Question 27May/June 2025, paper 22Multiple choice1 mark

  Zinc is used to galvanise iron to prevent it from rusting. Which statements are correct?

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