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Cambridge IGCSE Chemistry practice

Paper 3 structured question: Corrosion of metals

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3

Paper

1

Marks

Topic

Corrosion of metals

Exam-style question

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Paper 3Theory (Core)1 marks

Rusting is a common problem for iron structures.

Description

Rusting of Iron

Iron can corrode when exposed to moisture and oxygen, leading to rust formation.

  1. a

    State one method to prevent rusting of iron.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Corrosion of metals

Paper 3Theory (Core)3 marks

Description

Barrier Methods

Barrier methods include painting, oiling, and galvanizing to prevent rusting.

  1. a

    Describe how barrier methods stop rusting.

    Aim for approximately 3 distinct marking points.

    [3]