Extraction of metals — Paper 2 · IGCSE Science - Combined 0653

25 Iron occurs in the ground as iron oxide. Gold occurs in the ground as the element. Which statement explains this observation? A Gold is more reactive than iron. B Gold oxide is more reactive than iron oxide. C Iron is more reactive than gold. D Iron oxide is more reactive than gold oxide.

1 marks

Answer: C

This question in 0653/22 Feb/March 2017

25 Which substance is added to the blast furnace to remove acidic impurities during the extraction of iron? A calcium silicate B carbon monoxide C coke D limestone

1 marks

Answer: D

This question in 0653/21 Oct/Nov 2017

25 Which reaction does not take place in the blast furnace? A Calcium carbonate decomposes to make calcium oxide. B Carbon dioxide reacts with carbon to make carbon monoxide. C Carbon monoxide reacts with iron oxide to make iron. D Limestone reacts with iron oxide to make slag.

1 marks

Answer: D

This question in 0653/22 Oct/Nov 2017

26 A gas that causes climate change is formed during the extraction of iron from iron ore. Which solution reacts with this gas? A aqueous sodium chloride B hydrochloric acid C dilute sulfuric acid D limewater

1 marks

Answer: D

This question in 0653/22 Feb/March 2018

25 Which statement about metals is not correct? A Calcium is extracted from its ore by electrolysis. B Compounds containing metals are ionic and the metal is always the positive ion. C Magnesium is more reactive than iron because it forms positive ions less easily than iron. D Some metals react with dilute hydrochloric acid to give hydrogen.

1 marks

Answer: C

This question in 0653/22 May/June 2018

25 Which reaction does not take place in the blast furnace? A calcium carbonate → calcium oxide + carbon dioxide B calcium oxide + silicon dioxide → calcium silicate C iron oxide + carbon monoxide → iron + carbon dioxide D iron oxide + carbon dioxide → iron + carbon monoxide

1 marks

Answer: D

This question in 0653/23 May/June 2018

23 The reactivity series for some metals and carbon is shown. potassium sodium calcium magnesium aluminium carbon zinc copper most reactive least reactive Which process is used to extract calcium from its ore? A reducing the ore with carbon B electrolysis of the molten ore C heating the ore with aluminium D heating the ore in an inert atmosphere

1 marks

Answer: B

This question in 0653/22 Feb/March 2019

22 Iron obtained from the blast furnace contains small amounts of carbon and silicon. Which statement describes this iron? A It is a covalent compound. B It is an alloy. C It is an ionic compound. D It is slag.

1 marks

Answer: B

This question in 0653/21 May/June 2019

23 Which statement about the extraction of iron in a blast furnace is not correct? A Carbon dioxide reduces iron oxide. B Carbon monoxide is oxidised by iron oxide. C Carbon reduces carbon dioxide. D The high temperatures required are produced by reacting carbon with oxygen.

1 marks

Answer: A

This question in 0653/22 Oct/Nov 2019

23 Which equation does not represent a reaction that takes place in the blast furnace? A C + O2 → CO2 B C + CO2 → 2CO C 2Fe + CO2 → 2FeO + C D Fe2O3 + 3CO → 2Fe + 3CO2

1 marks

Answer: C

This question in 0653/23 Oct/Nov 2019

25 Why is carbon used to extract some metals from their oxide ores? A It oxidises the ore by removing oxygen. B It prevents the oxygen of the air reacting with the ore. C It reacts with impurities in the ore. D It reduces the ore by removing oxygen.

1 marks

Answer: D

This question in 0653/22 Feb/March 2020

25 Copper can be made from copper oxide by reacting it with carbon at a high temperature. Why is carbon used? A It does not react with copper. B It is a conductor of electricity. C It is a high melting point solid. D It is more reactive than copper.

1 marks

Answer: D

This question in 0653/21 May/June 2020

25 Copper can be made from copper oxide by reacting it with carbon at a high temperature. Why is carbon used? A It does not react with copper. B It is a conductor of electricity. C It is a high melting point solid. D It is more reactive than copper.

1 marks

Answer: D

This question in 0653/22 May/June 2020

25 Which method is used to extract copper from copper(II) oxide? A dissolving copper(II) oxide in hydrochloric acid and then filtering B dissolving copper(II) oxide in water and then filtering C heating the copper(II) oxide D heating the copper(II) oxide mixed with carbon

1 marks

Answer: D

This question in 0653/21 Oct/Nov 2020

25 Which method is used to extract copper from copper(II) oxide? A dissolving copper(II) oxide in hydrochloric acid and then filtering B dissolving copper(II) oxide in water and then filtering C heating the copper(II) oxide D heating the copper(II) oxide mixed with carbon

1 marks

Answer: D

This question in 0653/22 Oct/Nov 2020

26 Which method is used to extract copper from copper(II) oxide? A dissolving copper(II) oxide in hydrochloric acid and then filtering B dissolving copper(II) oxide in water and then filtering C heating the copper(II) oxide D heating the copper(II) oxide mixed with carbon

1 marks

Answer: D

This question in 0653/23 Oct/Nov 2020

21 Copper is extracted from its ore by heating with carbon. What is the role of the carbon in this process? A fuel B electrolyte C oxidising agent D reducing agent

1 marks

Answer: D

This question in 0653/22 Feb/March 2021

25 In the blast furnace, carbon reacts with carbon dioxide to form carbon monoxide. C + CO2  2CO Why is this reaction essential in the extraction of iron from hematite? A Carbon monoxide is needed to reduce iron oxide. B Carbon monoxide neutralises impurities to make slag. C The reaction removes carbon impurities from the iron ore. D The reaction prevents the release of greenhouse gases.

1 marks

Answer: A

This question in 0653/21 May/June 2021

25 Element X is a metal. X is more reactive than aluminium. Which method is used to obtain X? A electrolysis of a molten salt of X B electrolysis of an aqueous solution of a salt of X C heating the oxide of X with carbon D heating the oxide of X with hydrogen

1 marks

Answer: A

This question in 0653/22 May/June 2021

20 Iron is extracted from its oxide using carbon monoxide. The equation is shown. Fe2O3 + 3CO  2Fe + 3CO2 Which row identifies the reducing agent and explains how it acts as a reducing agent? reducing agent explanation A Fe2O3 it loses mass to become Fe B Fe2O3 it loses oxygen to become Fe C CO it gains mass to become CO2 D CO it removes oxygen from Fe2O3

1 marks

Answer: D

This question in 0653/23 May/June 2021

25 Carbon is used in the production of iron in a blast furnace. A student suggests four reasons why carbon is added to the blast furnace. 1 It is an oxidising agent. 2 It burns to produce high temperatures. 3 It removes impurities by forming slag. 4 It reacts with carbon dioxide to form carbon monoxide. Which reasons are correct? A 1 and 2 B 1 and 4 C 2 and 3 D 2 and 4

1 marks

Answer: D

This question in 0653/21 Oct/Nov 2021

25 Which row shows how copper can be obtained from copper oxide? heat copper oxide electrolysis of with carbon molten copper oxide v v 0 0O WwW > v x x v x x

1 marks

Answer: A

This question in 0653/22 Oct/Nov 2021

18 Iron oxide reacts with aluminium. Fe2O3 + 2Al  2Fe + Al 2O3 Which row identifies the oxidising agent and reducing agent in the reaction? oxidising agent reducing agent A aluminium oxide aluminium B aluminium oxide iron C iron(III) oxide aluminium D iron(III) oxide iron

1 marks

Answer: C

This question in 0653/23 Oct/Nov 2021

25 Which substance reduces iron(III) oxide in the blast furnace? A carbon dioxide B carbon monoxide C limestone D oxygen

1 marks

Answer: B

This question in 0653/23 Oct/Nov 2021

24 Which statement describes the correct order in which two reactions in a blast furnace occur? A Carbon dioxide is reduced, then carbon monoxide is oxidised. B Carbon monoxide is oxidised, then carbon dioxide is reduced. C Carbon monoxide is reduced, then carbon is oxidised. D Iron oxide is reduced, then carbon is oxidised.

1 marks

Answer: A

This question in 0653/22 Feb/March 2022

23 Iron is extracted from hematite in the blast furnace. Coke and hematite are added at the top of the blast furnace, and hot air enters at the bottom. Which statements are correct? 1 Coke burns to produce high temperatures. 2 Carbon monoxide is formed by the reaction of carbon with carbon dioxide. 3 Hematite contains iron(III) oxide which is oxidised by carbon monoxide. 4 The oxygen needed for the combustion of the coke comes from the hematite. A 1 and 2 B 1 and 3 C 2 and 3 D 3 and 4

1 marks

Answer: A

This question in 0653/21 May/June 2022

23 Which equations represent reactions that take place in the blast furnace? 1 C + O2  CO2 2 2CO2  2CO + O2 3 2FeO + C  2Fe + CO2 4 Fe2O3 + 3CO  2Fe + 3CO2 A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: B

This question in 0653/22 May/June 2022

23 Iron is extracted from iron(III) oxide in the blast furnace. Which reaction produces the heat to maintain a high temperature in the furnace? A calcium carbonate  calcium oxide + carbon dioxide B carbon + oxygen  carbon dioxide C iron(III) oxide + carbon monoxide  iron + carbon dioxide D silicon dioxide + calcium oxide  calcium silicate

1 marks

Answer: B

This question in 0653/23 May/June 2022

23 Which statement about reactions in the blast furnace is not correct? A Carbon is oxidised by oxygen. B Carbon is oxidised by carbon dioxide. C Carbon dioxide is reduced by iron oxide. D Iron oxide is reduced by carbon monoxide.

1 marks

Answer: C

This question in 0653/21 Oct/Nov 2022

23 Which metal cannot be extracted from its ore by heating with carbon? A Al B Cu C Fe D Zn

1 marks

Answer: A

This question in 0653/22 Oct/Nov 2022

20 The equation for one of the reactions that occurs in a blast furnace is shown. Fe2O3 + 3CO → 2Fe + 3CO2 Which row identifies the oxidising agent in this reaction and explains its role as an oxidising agent? oxidising agent explanation A carbon monoxide causes iron(III) oxide to gain oxygen B carbon monoxide causes iron(III) oxide to lose oxygen C iron(III) oxide causes carbon monoxide to gain oxygen D iron(III) oxide causes carbon monoxide to lose oxygen

1 marks

Answer: C

This question in 0653/22 Feb/March 2023

24 Copper oxide is heated with carbon as shown. copper oxide and carbon crucible tripod Bunsen burner Which statement about this experiment is correct? A A pink-brown solid is formed. B Carbon is placed underneath the copper oxide so that the air can react with the hot copper oxide. C Carbon reacts with the air to form carbon dioxide which then reacts with the copper oxide. D Copper is more reactive than carbon.

1 marks

Answer: A

This question in 0653/23 May/June 2023

25 Different reactions occur in the blast furnace. Which substances are products in some reactions and reactants in other reactions in the blast furnace? A carbon dioxide and carbon monoxide B carbon dioxide and carbon C carbon monoxide and iron D iron and carbon

1 marks

Answer: A

This question in 0653/21 Oct/Nov 2023

19 Lead can be extracted from lead(II) oxide by heating with carbon. The equation for the reaction is shown. 2PbO + C  2Pb + CO2 Which statement about this reaction is correct? A Carbon is a reducing agent because it removes oxygen from lead(II) oxide. B Carbon is reduced because it forms a gas. C Lead(II) oxide is a reducing agent because it forms an element. D Lead is oxidised because lead(II) oxide contains oxygen.

1 marks

Answer: A

This question in 0653/22 Oct/Nov 2023

25 Part of the reactivity series of metals is shown. calcium most reactive magnesium aluminium iron copper silver least reactive Metal X is the most reactive metal that can be extracted from its ore using carbon. Where is X placed in the reactivity series? A above calcium B between aluminium and iron C between copper and silver D between magnesium and aluminium

1 marks

Answer: B

This question in 0653/22 Oct/Nov 2023

25 The equations show reactions that occur in the extraction of copper and of iron. 1 2CuO + C  2Cu + CO2 2 C + O2  CO2 3 CO2 + C  2CO 4 Fe2O3 + 3CO  2Fe + 3CO2 Which equations show the reduction of a compound? A 1 and 2 B 1, 3 and 4 C 1 and 4 only D 2, 3 and 4

1 marks

Answer: B

This question in 0653/23 Oct/Nov 2023

24 The extraction of iron from hematite in the blast furnace involves three main reactions. Which substance is a product in one of these reactions and a reactant in one of the other reactions? A carbon B carbon dioxide C iron(III) oxide D oxygen

1 marks

Answer: B

This question in 0653/22 Feb/March 2024

25 Iron is extracted from its ore in a blast furnace. Which statement about this process is correct? A Carbon dioxide reduces iron(III) oxide. B Iron(III) oxide reduces carbon monoxide. C Carbon oxidises iron(III) oxide. D Carbon dioxide oxidises carbon.

1 marks

Answer: D

This question in 0653/21 May/June 2024

26 Which substance reduces iron(III) oxide in the blast furnace? A carbon dioxide B carbon monoxide C limestone (calcium carbonate) D oxygen

1 marks

Answer: B

This question in 0653/23 May/June 2024

24 Which metal is extracted from bauxite? A aluminium B copper C iron D zinc

1 marks

Answer: A

This question in 0653/23 Oct/Nov 2024

26 Which substances are initially placed in the blast furnace during the production of iron? 1 carbon 2 carbon monoxide 3 hematite A 1 and 3 B 1 only C 2 and 3 D 3 only

1 marks

Answer: A

This question in 0653/21 May/June 2025

23 Which row describes the extraction of iron from its ore? name of ore method of extraction A bauxite electrolysis B bauxite reduction in a blast furnace C hematite electrolysis D hematite reduction in a blast furnace

1 marks

Answer: D

This question in 0653/22 May/June 2025

27 Iron is extracted from hematite in the blast furnace. Which row shows the substance that reduces iron(III) oxide and the source of this substance in the blast furnace? substance source of this substance A carbon monoxide complete combustion of carbon-containing fuels B carbon monoxide reduction of carbon dioxide C carbon dioxide incomplete combustion of carbon-containing fuels D carbon dioxide oxidation of carbon monoxide

1 marks

Answer: B

This question in 0653/23 May/June 2025

25 Four equations are listed. 1 Fe2O3 + 3CO  2Fe + 3CO2 2 C + O2  CO2 3 2CO  C + CO2 4 CO2 + Fe  FeO + CO Which equations represent reactions that take place in the blast furnace? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

1 marks

Answer: A

This question in 0653/21 Oct/Nov 2025

23 The equations describe the reactions that happen when iron is extracted in the blast furnace. C + O2  CO2 C + CO2  2CO Fe2O3 + 3CO  2Fe + 3CO2 What is a description of one of these reactions? A Carbon dioxide is oxidised to form carbon monoxide. B Iron(III) oxide is reduced by carbon dioxide. C Carbon reacts with carbon monoxide to form carbon dioxide. D Carbon monoxide removes oxygen from iron(III) oxide.

1 marks

Answer: D

This question in 0653/23 Oct/Nov 2025