Electrolysis — Paper 1 · IGCSE Sciences - Co-ordinated (9-1) 0973

16 What is the electrolyte that is used when a nickel spoon is electroplated with copper? A copper B copper sulfate solution C nickel sulfate solution D nickel

1 marks

Answer: B

This question in 0973/11 May/June 2019

17 The diagram shows the electrolysis of lead(II) bromide using inert electrodes. coloured fumes electrode X electrode Y grey solid electrolyte Which statement about this experiment is correct? A Electrode X is positively charged. B The coloured fumes are produced at the negative electrode. C The electrolyte is lead(II) bromide. D The grey solid is lead(II) bromide.

1 marks

Answer: C

This question in 0973/11 May/June 2020

17 The diagram shows the electrolysis of lead(II) bromide using inert electrodes. coloured fumes electrode X electrode Y grey solid electrolyte Which statement about this experiment is correct? A Electrode X is positively charged. B The coloured fumes are produced at the negative electrode. C The electrolyte is lead(II) bromide. D The grey solid is lead(II) bromide.

1 marks

Answer: C

This question in 0973/12 May/June 2020

17 The diagram shows an electroplating experiment. + _ copper copper anode cathode aqueous copper nitrate Which row shows the change in mass of each electrode? anode cathode A decrease decrease B decrease increase C increase decrease D increase increase

1 marks

Answer: B

This question in 0973/11 Oct/Nov 2020

17 Apparatus used for electrolysis is shown. Which label identifies the electrolyte? A + – B C D

1 marks

Answer: D

This question in 0973/11 May/June 2021

22 Which statements describe carbon? 1 It forms basic oxides. 2 It is used as an electrode in electrolysis. 3 It is used to extract iron from its ore. A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

1 marks

Answer: D

This question in 0973/11 May/June 2021

22 Bauxite is the main ore of aluminium. Which method is used to extract pure aluminium from bauxite? A fractional distillation B electrolysis C neutralisation D thermal decomposition

1 marks

Answer: B

This question in 0973/12 May/June 2021

17 The diagram shows the electrolysis of a compound. switch + – P Q electrolyte When the switch is closed, the solution around electrode P turns orange because a halogen is formed. The positive electrode P is called the ……1……, and the halogen is ……2…… . Which words complete gaps 1 and 2? 1 2 A anode bromine B anode chlorine C cathode bromine D cathode chlorine

1 marks

Answer: A

This question in 0973/11 Oct/Nov 2021

17 The diagram shows the electrolysis of dilute sulfuric acid using inert electrodes. + – dilute sulfuric acid Which row shows the products formed at each electrode and describes the bonding in sulfuric acid? type of anode cathode bonding A oxygen hydrogen ionic B oxygen hydrogen covalent C hydrogen oxygen ionic D hydrogen oxygen covalent

1 marks

Answer: A

This question in 0973/11 May/June 2022

17 The diagram shows the electrolysis of dilute sulfuric acid using inert electrodes. + – dilute sulfuric acid Which row shows the products formed at each electrode and describes the bonding in sulfuric acid? type of anode cathode bonding A oxygen hydrogen ionic B oxygen hydrogen covalent C hydrogen oxygen ionic D hydrogen oxygen covalent

1 marks

Answer: A

This question in 0973/12 May/June 2022

17 Which process is used to produce sodium and chlorine from the compound sodium chloride? A chromatography B cracking C distillation D electrolysis

1 marks

Answer: D

This question in 0973/11 Oct/Nov 2022

18 Which diagram shows equipment used to electroplate nickel with copper? A B power supply power supply + – + – nickel copper nickel copper molten aqueous copper chloride copper chloride C D power supply power supply + – + – copper nickel copper nickel molten aqueous copper chloride copper chloride

1 marks

Answer: D

This question in 0973/11 May/June 2023

18 Molten lead(II) bromide is electrolysed using inert electrodes as shown. power supply + – molten lead(II) bromide An element is produced at the negative electrode. What is the name of the element and of the negative electrode? negative element electrode A bromine anode B bromine cathode C lead anode D lead cathode

1 marks

Answer: D

This question in 0973/12 May/June 2023

18 The diagram shows the electrolysis of dilute sulfuric acid using inert electrodes. dilute sulfuric acid – + 6 V d.c. Which substance is produced by electrolysis at the negative electrode? A hydrogen B oxygen C sulfur dioxide D water vapour

1 marks

Answer: A

This question in 0973/11 Oct/Nov 2023

24 Which metal is extracted from its ore by electrolysis? A aluminium B copper C gold D iron

1 marks

Answer: A

This question in 0973/11 Oct/Nov 2023

18 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? A chlorine B hydrogen C hydrochloric acid D sodium hydroxide

1 marks

Answer: D

This question in 0973/11 May/June 2024

18 Which elements are formed at the electrodes during the electrolysis of concentrated aqueous sodium chloride? anode cathode A chlorine sodium B chlorine hydrogen C hydrogen chlorine D sodium chlorine

1 marks

Answer: B

This question in 0973/11 Oct/Nov 2024

19 Molten lead(II) bromide is electrolysed using inert electrodes. Which row describes the products of this electrolysis? a red-brown gas a grey metal lead and bromine forms at the forms at the are the only negative positive electrode products electrode A yes no no B yes yes yes C no no yes D no yes no

1 marks

Answer: C

This question in 0973/11 May/June 2025

16 The apparatus used in the electrolysis of concentrated aqueous sodium chloride is shown. 1 + – 3 2 4 Which row identifies the electrolyte and the cathode? electrolyte cathode A 1 2 B 1 3 C 4 2 D 4 3

1 marks

Answer: C

This question in 0973/12 May/June 2025

19 The electrolysis of concentrated aqueous sodium chloride is shown. inert inert positive negative electrode electrode concentrated aqueous sodium chloride Which statement describes the product at the cathode? A It is a colourless gas that pops with a lighted splint. B It is a colourless gas that relights a glowing splint. C It is a grey-black solid. D It is a pale yellow-green gas that bleaches litmus paper.

1 marks

Answer: A

This question in 0973/11 Oct/Nov 2025