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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Corrosion of metals

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3

Paper

3

Marks

Topic

Corrosion of metals

Exam-style question

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Paper 3Theory (Core)3 marks

Understanding rusting is crucial for material preservation.

Description

Factors Affecting Rusting

The presence of salt can increase the rate of rusting in iron.

  1. a

    Discuss the role of salt in the rusting process of iron.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 3 structured question: Corrosion of metals

Paper 3Theory (Core)2 marks

Description

Rusting Process

Iron rusts when it is exposed to moisture and oxygen, leading to the formation of iron oxide.

  1. a

    Explain the conditions necessary for iron to rust.

    Aim for approximately 2 distinct marking points.

    [2]