Cambridge IGCSE Chemistry practice

Paper 3 structured question: Redox

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Redox

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Paper 3Theory (Core)1 marks

Oxidation numbers in compounds

Description

Determine the oxidation numbers of the elements in the following compounds: 1. NaCl 2. H₂O 3. Fe₂O₃

a
State the oxidation number of sodium in NaCl.
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[1]

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Paper 3Theory (Core)1 marks

Description

Identify the oxidation numbers of the following elements in their compounds: 1. Oxygen in H₂O 2. Iron in Fe₂O₃

a
State the oxidation number of oxygen in H₂O.
Your answer
Aim for approximately 1 distinct marking point.
[1]