Cambridge IGCSE Combined Science practice

Paper 3 structured question: Electrolysis

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Paper

Marks

Topic

Electrolysis

Exam-style question

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Paper 3Theory (Core)3 marks

Electrolysis of different substances

Description

Consider the electrolysis of molten lead(II) bromide, concentrated aqueous sodium chloride, and dilute sulfuric acid using inert electrodes.

a
Analyse Identify the products formed at the electrodes for each substance and explain the observations made during the electrolysis process.
Your answer
Aim for approximately 3 distinct marking points.
[3]

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Paper 3Theory (Core)2 marks

Description

Describe the electrolysis of concentrated aqueous sodium chloride and dilute sulfuric acid, focusing on the products formed at each electrode.

a
Describe What are the products formed at the cathode and anode for both solutions?
Your answer
Aim for approximately 2 distinct marking points.
[2]