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Cambridge IGCSE Chemistry practice

Paper 4 structured question: Redox

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Redox

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Paper 4Theory (Extended)1 marks

Understanding the concept of oxidation is essential in chemistry.

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Oxidation Process

In a chemical reaction, a substance loses electrons and its oxidation number increases. This process is known as oxidation.

  1. a

    State the definition of oxidation.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 4 structured question: Redox

Paper 4Theory (Extended)3 marks

Description

Oxidation in Reactions

Consider a reaction where a metal loses electrons to form a cation. This process increases the oxidation number of the metal.

  1. a

    Explain why this process is classified as oxidation.

    Aim for approximately 3 distinct marking points.

    [3]