Alkanes — Paper 1 · IGCSE Science - Combined 0653

27 Which equation shows the complete combustion of ethane, C2H6? A C2H6 + 3O2 → CO + CO2 + 3H2O B 2C2H6 + 3O2 → 4C + 6H2O C 2C2H6 + 5O2 → 4CO + 6H2O D 2C2H6 + 7O2 → 4CO2 + 6H2O

1 marks

Answer: D

This question in 0653/11 Oct/Nov 2005

26 The diagrams show models of two molecules found in crude oil. key = atom of X = atom of Y Which element could X be? A carbon B hydrogen C nitrogen D oxygen

1 marks

Answer: A

This question in 0653/11 May/June 2007

17 Two products, X and Y, are formed in the complete combustion of methane. What are X and Y? A carbon and hydrogen B carbon and water C carbon dioxide and hydrogen D carbon dioxide and water

1 marks

Answer: D

This question in 0653/11 Oct/Nov 2007

24 The equations for two reactions are shown. X PbCO3 → PbO + CO2 Y CH4 + 2O2 → CO2 + 2H2O Which types of reaction are X and Y? X Y A combustion neutralisation B combustion thermal decomposition C thermal decomposition combustion D thermal decomposition neutralisation

1 marks

Answer: C

This question in 0653/11 Oct/Nov 2010

26 Two products, X and Y, are formed in the complete combustion of methane. What are X and Y? A carbon and hydrogen B carbon and water C carbon dioxide and hydrogen D carbon dioxide and water

1 marks

Answer: D

This question in 0653/11 Oct/Nov 2010

26 Kerosene is a hydrocarbon fuel obtained from crude oil. Which statement is correct? A Kerosene burns to form carbon dioxide and water. B Kerosene contains the elements carbon, hydrogen and oxygen. C Kerosene is used as a fuel for cars. D The combustion of kerosene is an endothermic reaction.

1 marks

Answer: A

This question in 0653/11 May/June 2011

26 The structure of a molecule is shown. H H H H H C C C C H H H H H Which term correctly describes this molecule? A hydrocarbon B monomer C petroleum D polymer

1 marks

Answer: A

This question in 0653/11 Oct/Nov 2011

27 The structure of a molecule is shown. H H H H H C C C C H H H H H Which term correctly describes this molecule? A hydrocarbon B monomer C petroleum D polymer

1 marks

Answer: A

This question in 0653/12 Oct/Nov 2011

25 The structure of a molecule is shown. H H H H H C C C C H H H H H Which term correctly describes this molecule? A hydrocarbon B monomer C petroleum D polymer

1 marks

Answer: A

This question in 0653/13 Oct/Nov 2011

26 Which statements about the complete combustion of methane are correct? 1 The reaction is endothermic. 2 Carbon dioxide is formed. 3 Water is formed. 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 0653/12 May/June 2013

26 The diagram shows a molecule of ethane. key carbon atom hydrogen atom What is the molecular formula of ethane? A CH6 B CH3 C C2H4 D C2H6

1 marks

Answer: D

This question in 0653/13 May/June 2013

15 Which reaction involves combustion? A calcium carbonate → calcium oxide + carbon dioxide B methane + oxygen → carbon dioxide + water C sodium carbonate + hydrochloric acid → sodium chloride + water + carbon dioxide D sodium hydroxide + hydrochloric acid → sodium chloride + water

1 marks

Answer: B

This question in 0653/13 Oct/Nov 2013

18 The formula of the hydrocarbon octane is C8H18. What are the products of complete combustion of octane? A carbon and hydrogen B carbon and water C carbon dioxide and water D carbon monoxide and water

1 marks

Answer: C

This question in 0653/11 May/June 2014

27 Which statement describes a hydrocarbon? A a compound that burns to form carbon dioxide and hydrogen B a compound that contains carbon and hydrogen only C a compound that only contains ionic bonds D a compound that reacts easily with metals

1 marks

Answer: B

This question in 0653/12 May/June 2014

19 The formula of the hydrocarbon octane is C8H18. What are the products of complete combustion of octane? A carbon and hydrogen B carbon and water C carbon dioxide and water D carbon monoxide and water

1 marks

Answer: C

This question in 0653/13 May/June 2014

25 Gasoline is a hydrocarbon fuel obtained from crude oil. Which statement is correct? A Gasoline burns to form carbon dioxide and water. B Gasoline contains the elements carbon, hydrogen and oxygen. C Gasoline is used as a fuel for diesel engines. D The combustion of gasoline is an endothermic reaction.

1 marks

Answer: A

This question in 0653/12 Oct/Nov 2014

27 Which compound is the main constituent of natural gas? A butane B ethane C methane D propane

1 marks

Answer: C

This question in 0653/11 May/June 2015

27 Which gas is the main constituent of natural gas? A carbon dioxide B methane C nitrogen D oxygen

1 marks

Answer: B

This question in 0653/13 May/June 2015

17 The structure of a hydrocarbon is shown. H H C H H H H C C C H H H H What is the formula of the hydrocarbon? A C2H5 B C3H8 C C4H9 D C4H10

1 marks

Answer: D

This question in 0653/12 Oct/Nov 2015

27 Methane, ethane and propane are all alkanes. Their formulae are shown below. methane, CH4 ethane, C2H6 propane, C3H8 Which statement is not correct? A All three of these compounds are hydrocarbons. B All three of these compounds burn. C Methane is the main constituent of natural gas. D Propane burns completely to form carbon dioxide and hydrogen.

1 marks

Answer: D

This question in 0653/12 Oct/Nov 2015

27 What is the main constituent of natural gas? A ethane B methane C nitrogen D oxygen

1 marks

Answer: B

This question in 0653/12 Oct/Nov 2016

27 Substance X burns in air to form carbon dioxide and water. What is substance X? A a noble gas B an alkane C carbon D hydrogen

1 marks

Answer: B

This question in 0653/13 Oct/Nov 2016

17 The diagram represents a molecule of propane. H H H H C C C H H H H What is the formula of propane? A C2H6 B C2H8 C C3H6 D C3H8

1 marks

Answer: D

This question in 0653/12 Oct/Nov 2017

27 What gas is the main constituent of natural gas? A carbon dioxide B methane C nitrogen D oxygen

1 marks

Answer: B

This question in 0653/12 Feb/March 2018

27 What is the structure of ethane? A B C D H H H H H H H C C H C H H C C O H H C C H H H H H H H H

1 marks

Answer: D

This question in 0653/11 Oct/Nov 2018

27 Which statement about alkanes is not correct? A Alkanes are unsaturated hydrocarbons. B Alkanes burn to release heat energy. C Alkanes form carbon dioxide and water when they burn. D Alkane molecules contain only single bonds.

1 marks

Answer: A

This question in 0653/11 May/June 2019

27 Which statement about alkanes is correct? A Alkanes are compounds containing carbon, hydrogen and oxygen. B Alkanes are saturated hydrocarbons. C Ethane is used to make poly(ethene). D Methane is the only alkane that does not contain a double bond.

1 marks

Answer: B

This question in 0653/12 May/June 2019

27 Which reaction involves combustion? A calcium carbonate → calcium oxide + carbon dioxide B methane + oxygen → carbon dioxide + water C sodium carbonate + hydrochloric acid → sodium chloride + water + carbon dioxide D sodium hydroxide + hydrochloric acid → sodium chloride + water

1 marks

Answer: B

This question in 0653/11 May/June 2020

27 Which statement about hydrocarbons is correct? A Alkanes are produced by cracking alkenes. B Alkanes decolourise bromine water. C Alkenes are saturated hydrocarbons. D Alkenes contain a double bond.

1 marks

Answer: D

This question in 0653/12 Feb/March 2021

27 Which statements about methane are correct? 1 It is the main constituent of natural gas. 2 It is generally unreactive. 3 It turns aqueous bromine colourless. 4 It contains a double covalent bond. A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: A

This question in 0653/11 Oct/Nov 2021

27 Which statement describes a saturated hydrocarbon gas but not any other gas? A It contains carbon and hydrogen atoms bonded by single covalent bonds only. B It contains carbon and hydrogen atoms only. C It burns completely to give carbon dioxide and water. D It rapidly decolourises aqueous bromine.

1 marks

Answer: A

This question in 0653/12 Feb/March 2022

27 Methane, ethane and propane are all alkanes. Their formulae are shown. methane, CH4 ethane, C2H6 propane, C3H8 Which statement is not correct? A All three compounds are hydrocarbons. B All three compounds burn. C Methane is the main constituent of natural gas. D Propane burns completely to form carbon dioxide and hydrogen.

1 marks

Answer: D

This question in 0653/11 May/June 2022

27 Methane, ethane and propane are all alkanes. Their formulae are shown. methane, CH4 ethane, C2H6 propane, C3H8 Which statement is not correct? A All three compounds are hydrocarbons. B All three compounds burn. C Methane is the main constituent of natural gas. D Propane burns completely to form carbon dioxide and hydrogen.

1 marks

Answer: D

This question in 0653/12 May/June 2022

27 Methane, ethane and propane are all alkanes. Their formulae are shown. methane, CH4 ethane, C2H6 propane, C3H8 Which statement is not correct? A All three compounds are hydrocarbons. B All three compounds burn. C Methane is the main constituent of natural gas. D Propane burns completely to form carbon dioxide and hydrogen.

1 marks

Answer: D

This question in 0653/13 May/June 2022

27 The formula of the hydrocarbon octane is C8H18. What are the products of the complete combustion of octane? A carbon and hydrogen B carbon and water C carbon dioxide and water D carbon monoxide and water

1 marks

Answer: C

This question in 0653/11 Oct/Nov 2022

27 The formula of the hydrocarbon octane is C8H18. What are the products of the complete combustion of octane? A carbon and hydrogen B carbon and water C carbon dioxide and water D carbon monoxide and water

1 marks

Answer: C

This question in 0653/12 Oct/Nov 2022

27 The formula of the hydrocarbon octane is C8H18. What are the products of the complete combustion of octane? A carbon and hydrogen B carbon and water C carbon dioxide and water D carbon monoxide and water

1 marks

Answer: C

This question in 0653/13 Oct/Nov 2022

26 Ethane is a hydrocarbon. What are the products of the complete combustion of ethane? A carbon dioxide and hydrogen B carbon dioxide and water C carbon monoxide and hydrogen D carbon monoxide and water

1 marks

Answer: B

This question in 0653/12 Feb/March 2023

27 The structures of four organic compounds are shown. 1 2 3 4 H H H H H H H H H H C C C H H C H H C C C H H C C O H H H H H H H H Which compounds are alkanes? A 1, 2 and 3 B 1 and 2 only C 1, 3 and 4 D 3 and 4 only

1 marks

Answer: B

This question in 0653/12 May/June 2023

27 Which statement about propane is correct? A It is the main constituent of natural gas. B It is a very reactive substance. C It is a saturated hydrocarbon. D It reacts rapidly with aqueous bromine.

1 marks

Answer: C

This question in 0653/13 May/June 2023

26 Which statement about alkanes is correct? A Their molecules are unsaturated. B They are generally reactive compounds. C They are mixtures of carbon and hydrogen atoms only. D They produce water when they burn.

1 marks

Answer: D

This question in 0653/11 Oct/Nov 2023

26 Decane is an alkane. Which statement about decane is correct? A It burns in air to form carbon dioxide and hydrogen. B It is an unsaturated hydrocarbon. C It only contains single C–C and C–H bonds. D It rapidly decolourises bromine water.

1 marks

Answer: C

This question in 0653/12 Oct/Nov 2023

26 Decane is an alkane. Which statement about decane is correct? A It burns in air to form carbon dioxide and hydrogen. B It is an unsaturated hydrocarbon. C It only contains single C–C and C–H bonds. D It rapidly decolourises bromine water.

1 marks

Answer: C

This question in 0653/13 Oct/Nov 2023

27 Which statement about hydrocarbons is correct? A Alkanes rapidly decolourise bromine water. B Alkanes are unsaturated hydrocarbons. C Alkenes have double covalent bonds. D Alkenes are the main constituent of natural gas.

1 marks

Answer: C

This question in 0653/12 Feb/March 2024

27 Which row about alkanes is correct? type of hydrocarbon products of complete combustion A saturated carbon dioxide and hydrogen B saturated carbon dioxide and water C unsaturated carbon dioxide and hydrogen D unsaturated carbon dioxide and water

1 marks

Answer: B

This question in 0653/11 May/June 2024

27 Butane is a hydrocarbon. What are the products of the complete combustion of butane? A carbon and hydrogen B carbon dioxide and hydrogen C carbon dioxide and water D carbon dioxide only

1 marks

Answer: C

This question in 0653/12 May/June 2024

27 Which statements about alkanes are correct? 1 They are generally unreactive. 2 They are unsaturated because they contain only single covalent bonds. 3 They contain carbon, hydrogen and oxygen. 4 They form carbon dioxide and water during complete combustion. A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

1 marks

Answer: B

This question in 0653/13 May/June 2024

27 Which statement about alkanes is correct? A They contain double bonds. B They react with acids. C They react with aqueous bromine. D They undergo complete combustion.

1 marks

Answer: D

This question in 0653/11 Oct/Nov 2024

26 Which statement explains why alkanes are saturated compounds? A They are not very reactive. B They contain double covalent bonds. C They contain carbon and hydrogen only. D They contain only single covalent bonds.

1 marks

Answer: D

This question in 0653/12 Oct/Nov 2024

26 Which statement explains why alkanes are saturated compounds? A They are not very reactive. B They contain double covalent bonds. C They contain carbon and hydrogen only. D They contain only single covalent bonds.

1 marks

Answer: D

This question in 0653/13 Oct/Nov 2024

24 Which equation shows the complete combustion of an alkane? A methane + oxygen  water + carbon dioxide B methane + oxygen  water + carbon monoxide C ethene + oxygen  water + carbon dioxide D ethene + oxygen  water + carbon monoxide

1 marks

Answer: A

This question in 0653/12 Feb/March 2025

24 What is the main constituent of natural gas? A ethane B nitrogen C methane D oxygen

1 marks

Answer: C

This question in 0653/11 Oct/Nov 2025

25 Pentane is a hydrocarbon. The word equation for the complete combustion of pentane is shown. pentane + oxygen  carbon dioxide + substance W What is substance W? A carbon monoxide B ethane C hydrogen D water

1 marks

Answer: D

This question in 0653/11 Oct/Nov 2025

24 Which gas forms during the complete combustion of methane? A carbon monoxide B carbon dioxide C hydrogen D oxygen

1 marks

Answer: B

This question in 0653/12 Oct/Nov 2025

24 Which gas forms during the complete combustion of methane? A carbon monoxide B carbon dioxide C hydrogen D oxygen

1 marks

Answer: B

This question in 0653/13 Oct/Nov 2025