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Cambridge IGCSE Chemistry practice

Paper 3 structured question: Redox

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Redox

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Paper 3Theory (Core)1 marks

Redox reactions are fundamental in various chemical processes.

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Redox Reaction Example

Consider the reaction between zinc and copper sulfate: Zn + CuSO4 → ZnSO4 + Cu.

  1. a

    State the substance that is oxidized in the reaction.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Redox

Paper 3Theory (Core)2 marks

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Redox Reaction Analysis

In a redox reaction, one reactant is oxidized and another is reduced. Identify the oxidizing and reducing agents in the following reaction: 2H2 + O2 → 2H2O.

  1. a

    Identify the oxidizing agent in the reaction.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    Identify the reducing agent in the reaction.

    Aim for approximately 1 distinct marking point.

    [1]