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Cambridge IGCSE Chemistry practice

Paper 4 structured question: Corrosion of metals

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4

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6

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Topic

Corrosion of metals

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Paper 4Theory (Extended)6 marks

The effectiveness of galvanizing in protecting metals is well documented.

Description

Galvanizing Process

Zinc coating prevents rusting and extends the life of iron and steel products.

  1. a

    Describe how zinc provides protection to iron and steel in galvanizing.

    Aim for approximately 6 distinct marking points.

    [6]

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Paper 4 structured question: Corrosion of metals

Paper 4Theory (Extended)1 marks

Description

Zinc in Galvanizing

Zinc serves both as a barrier and sacrificial protection for metals.

  1. a

    State the two main roles of zinc in galvanizing.

    Aim for approximately 1 distinct marking point.

    [1]