Cambridge IGCSE Chemistry practice

Paper 3 structured question: Redox

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Paper

Marks

Topic

Redox

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Paper 3Theory (Core)2 marks

Consider the following reaction: 2Mg + O2 → 2MgO.

Description

In this reaction, magnesium reacts with oxygen to form magnesium oxide. Identify the oxidation and reduction processes involved.

a
Identify Which substance is oxidized and which is reduced?
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Aim for approximately 2 distinct marking points.
[2]

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Paper 3Theory (Core)1 marks

Description

In redox reactions, one reactant is oxidized while another is reduced. This involves the transfer of oxygen between the reactants.

a
State What is meant by a redox reaction?
Your answer
Aim for approximately 1 distinct marking point.
[1]