Electrochemistry — IGCSE Sciences - Co-Ordinated (0973) questions by topic
Electrochemistry questions identify electrolysis products from molten lead bromide, write the cathode half-equation for aqueous copper sulfate electrolysis, describe sodium hydroxide manufacture from concentrated sodium chloride, and identify correct electroplating equipment, worth from 1 to 8 marks in this IGCSE Co-ordinated Sciences set.
Identify, state and construct top the command words, with complete and explain also common: construct a half-equation with balanced charge, not just balanced atoms. 14 real questions from 2023 to 2025 papers make up this page. Submit each attempt for instant marking so an unbalanced half-equation is flagged before it recurs across every electrolysis question.
May–June 2025, Paper 11
Molten lead(II) bromide is electrolysed using inert electrodes. Which row describes the products of this electrolysis? a grey metal forms at the positive electrode a red-brown gas…
Answer this question and get it marked →May–June 2025, Paper 12
The apparatus used in the electrolysis of concentrated aqueous sodium chloride is shown. The circuit includes a switch labelled 1; the positive electrode is labelled 3 and the…
Answer this question and get it marked →May–June 2025, Paper 21
Which gas is formed at the cathode during electrolysis? A carbon dioxide B chlorine C hydrogen D oxygen
Answer this question and get it marked →May–June 2024, Paper 11
When concentrated aqueous sodium chloride is electrolysed using inert electrodes, the remaining solution turns red litmus paper to blue. Which substance causes this colour change?…
Answer this question and get it marked →May–June 2024, Paper 21
Two electrolysis experiments are done using inert electrodes. Experiment 1 is the electrolysis of aqueous copper(II) sulfate. Experiment 2 is the electrolysis of molten lithium…
Answer this question and get it marked →May–June 2024, Paper 22
Aqueous copper(II) sulfate is electrolysed using carbon electrodes. What is the ionic half-equation for the reaction at the cathode? A Cu2+ + 2e- - Cu B 2H+ + 2e- - H2 C Cu - Cu2+…
Answer this question and get it marked →May–June 2024, Paper 41
Electrolysis is the breakdown of an ionic compound by the passage of electricity. Complete the sentences about the products of electrolysis (choose from: electrolytes, hydrogen,…
Answer this question and get it marked →May–June 2023, Paper 11
Which diagram shows equipment used to electroplate nickel with copper? [Diagrams A-D: power supply connected to nickel and copper electrodes in molten or aqueous copper chloride.…
Answer this question and get it marked →May–June 2023, Paper 12
Molten lead(II) bromide is electrolysed using inert electrodes. An element is produced at the negative electrode. [Diagram: power supply with + and - terminals, inert electrodes…
Answer this question and get it marked →May–June 2023, Paper 21
Sodium hydroxide is manufactured by the electrolysis of concentrated aqueous sodium chloride. During the process, a gas is given off at each electrode and the aqueous sodium…
Answer this question and get it marked →May–June 2023, Paper 22
Which statement about the extraction of aluminium from its ore by electrolysis is correct? A Aluminium gains electrons from the anode. B Aluminium ions are oxidised at the…
Answer this question and get it marked →May–June 2023, Paper 42
Electrolysis is the breakdown of an ionic compound, when molten or in aqueous solution, by the passage of electricity. Table 11.1 shows the products of electrolysis of some…
Answer this question and get it marked →October–November 2023, Paper 11
The diagram shows the electrolysis of dilute sulfuric acid using inert electrodes connected to a 6 V d.c. supply. [Diagram: electrolysis of dilute sulfuric acid; negative and…
Answer this question and get it marked →October–November 2023, Paper 41
Molten lead(II) bromide conducts electricity. When molten lead(II) bromide is electrolysed, lead is made at the cathode. State the product at the anode.
Answer this question and get it marked →Other IGCSE Sciences - Co-Ordinated topics
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