Cambridge IGCSE · Chemistry (0620)

Electrolysis: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Electrolysis.

10 questions26 marksFree, no account

Question 1

1 mark

What is the product formed at the cathode during the electrolysis of molten lead(II) bromide, \(\text{PbBr}_2\)?

Question 2

1 mark

Which statement correctly describes why ionic compounds can undergo electrolysis when molten but not when solid?

Question 3

1 mark

A student electrolyses concentrated aqueous sodium chloride using inert carbon electrodes. Which result is observed during this process?

Question 4

1 mark

What are the products formed during the electrolysis of concentrated aqueous sodium chloride using inert electrodes?

Question 5

1 mark

When concentrated aqueous sodium chloride is electrolyzed using inert electrodes, which observation correctly matches the electrode and the product formed?

Question 6

2 marks

In a simple electrolytic cell, identify which electrode is the anode and which is the cathode in terms of their electrical charge.

Write your answer out first, then check it against the worked solution.

Question 7

4 marks

Describe the observations made at the anode and cathode during the electrolysis of molten lead(II) bromide using carbon electrodes.

Write your answer out first, then check it against the worked solution.

Question 8

6 marks

Predict the products formed at the electrodes during the electrolysis of concentrated aqueous sodium chloride using inert carbon electrodes.

Write your answer out first, then check it against the worked solution.

Question 9

4 marks

Electrolysis involves the use of electricity to break down ionic compounds.
(a) Define the term electrolysis.
(b) During the electrolysis of molten lead(II) bromide, \(PbBr_2\), identify the products formed at the anode and the cathode.
(c) Describe the observations made at each electrode during this process.

Write your answer out first, then check it against the worked solution.

Question 10

5 marks

Concentrated aqueous sodium chloride, known as brine, is electrolyzed using inert carbon electrodes.
(a) List all the ions present in the electrolyte.
(b) Identify the gas produced at the anode and explain why it is formed instead of oxygen.
(c) Identify the product at the cathode.

Write your answer out first, then check it against the worked solution.

* The content provided by thinka is generated by AI and may not always be accurate or up-to-date. Please use it as a supplementary resource and verify with official materials.

You've seen the model answer. Now get yours marked.

This page can show you how a good answer looks. It cannot tell you what your answer was missing. thinka marks your written work against the real mark scheme in about 15 seconds.

Get My Answers Marked Back to the notes

Want more questions like these? Get a fresh set on this topic, marked as you go.