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Cambridge IGCSE Chemistry practice

Paper 4 structured question: Alloys and their properties

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Alloys and their properties

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Paper 4Theory (Extended)4 marks

Alloys are commonly used in engineering and construction due to their desirable properties.

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Advantages of Alloys

Alloys are engineered to have specific properties that make them suitable for various applications. Their increased hardness and strength compared to pure metals are primarily due to the presence of different sized atoms.

  1. a

    Explain how the structural differences in alloys contribute to their increased hardness and strength.

    Aim for approximately 4 distinct marking points.

    [4]

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Paper 4 structured question: Alloys and their properties

Paper 4Theory (Extended)1 marks

Description

Properties of Alloys

Alloys are mixtures of metals that exhibit improved hardness and strength compared to pure metals. The presence of atoms of different sizes disrupts the regular arrangement of atoms, making it harder for the layers to slide past each other.

  1. a

    State one reason why alloys are stronger than pure metals.

    Aim for approximately 1 distinct marking point.

    [1]