Terminology — Paper 2 · IGCSE Science - Combined 0653

27 Which pair of hydrocarbons can be distinguished from each other by the addition of bromine water? H H A C C and butane H H H H H B H C C C and butene H H H H C H C C H and methane H H H H D C C and propene H H

1 marks

Answer: A

This question in 0653/22 Feb/March 2017

27 Which statement about hydrocarbons is not correct? A Alkenes are made by cracking alkanes. B Butene decolourises bromine. C C2H4 is an alkene. D Ethanol is an alkane.

1 marks

Answer: D

This question in 0653/23 May/June 2018

27 Which statement describes compounds in the same homologous series? A They have different general formulae and different chemical properties. B They have different general formulae and similar chemical properties. C They have the same general formula and different chemical properties. D They have the same general formula and similar chemical properties.

1 marks

Answer: D

This question in 0653/22 Feb/March 2019

26 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 0653/22 May/June 2019

27 Which hydrocarbons belong to the same homologous series? A C2H2, C2H4, C2H6 B CH4, C2H4, C3H4 C C2H4, C3H6, C4H8 D C2H4, C3H8, C4H10

1 marks

Answer: C

This question in 0653/22 Oct/Nov 2019

18 Which diagram represents a molecule of methanol? A B H H H C O H H C O H H H C D H H H C O H H C O H H H

1 marks

Answer: D

This question in 0653/22 Feb/March 2020

27 In which list are all of the hydrocarbons in the same homologous series? A CH4, C2H6, C3H8, C5H10 B C2H4, C2H6, C3H6, C4H8 C C2H4, C3H6, C4H8, C5H10 D C2H6, C3H6, C4H8, C5H10

1 marks

Answer: C

This question in 0653/22 May/June 2020

26 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 0653/21 Oct/Nov 2020

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 0653/22 Oct/Nov 2020

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 0653/23 Oct/Nov 2020

27 Which type of compound contains only carbon and hydrogen? A carbohydrate B carbonate C hydrocarbon D hydroxide

1 marks

Answer: C

This question in 0653/21 May/June 2021

27 Which type of compound contains only carbon and hydrogen? A carbohydrate B carbonate C hydrocarbon D hydroxide

1 marks

Answer: C

This question in 0653/22 May/June 2021

27 Which type of compound contains only carbon and hydrogen? A carbohydrate B carbonate C hydrocarbon D hydroxide

1 marks

Answer: C

This question in 0653/23 May/June 2021

25 Alkenes are hydrocarbons that belong to the same homologous series. What are the general properties of a homologous series? 1 same general formula 2 same melting point 3 similar chemical properties A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

1 marks

Answer: B

This question in 0653/21 May/June 2022

25 Which statement about homologous series is correct? A Alkanes and alkenes have the same general formula. B Alkenes contain only double bonds. C Alkanes and alkenes have similar chemical properties. D Ethene, C2H4, and propene, C3H6, are members of the same homologous series.

1 marks

Answer: D

This question in 0653/22 May/June 2022

25 Which statement best describes the members of a homologous series? A They have different general formulae and different chemical properties. B They have different general formulae and similar chemical properties. C They have the same general formula and different chemical properties. D They have the same general formula and similar chemical properties.

1 marks

Answer: D

This question in 0653/23 May/June 2022

27 Which statement about the homologous series of alkenes is correct? A They are all saturated hydrocarbons. B They all have the same physical properties. C Their molecules have the same ratio of carbon atoms to hydrogen atoms. D They all have the same molecular formula.

1 marks

Answer: C

This question in 0653/22 Feb/March 2023

26 Why are alkanes members of the same homologous series? A They are all hydrocarbons. B They have similar physical properties. C They have the same general formula. D They all undergo combustion to give carbon dioxide and water.

1 marks

Answer: C

This question in 0653/21 May/June 2023

26 Which statements about the members of an homologous series are correct? 1 They have similar chemical properties. 2 They have the same boiling points. 3 They have the same general formula. A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

1 marks

Answer: C

This question in 0653/22 May/June 2023

26 Which statement about all alkanes is correct? A They contain the same number of carbon atoms. B They have different chemical properties. C They have the same general formula. D They have the same melting point.

1 marks

Answer: C

This question in 0653/23 May/June 2023

27 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 0653/21 Oct/Nov 2023

27 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 0653/22 Oct/Nov 2023

27 An equation representing the cracking of octacosane, C28H58, is shown. C28H58  C10H22 + … 1 … + … 2 … Which row identifies two other possible products of this reaction? 1 2 A C4H10 C14H28 B C6H14 C11H22 C C10H20 C8H18 D C12H24 C6H12

1 marks

Answer: D

This question in 0653/22 Feb/March 2024

26 Which statement about alkenes is correct? A They are saturated hydrocarbons. B They have the general formula CnH2n+2. C They have similar chemical properties. D They are all gases at room temperature.

1 marks

Answer: C

This question in 0653/22 May/June 2024

27 Which statements describe the molecules within a single fraction obtained from petroleum? 1 They are unsaturated hydrocarbons. 2 They have very different numbers of carbon atoms. 3 They have similar boiling points. 4 They react with other chemicals in a similar way. A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

1 marks

Answer: D

This question in 0653/23 May/June 2024

26 Which statements about the alkanes are correct? 1 They are saturated hydrocarbons. 2 They produce carbon monoxide and water during complete combustion. 3 They are generally unreactive, except in terms of burning. A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

1 marks

Answer: C

This question in 0653/21 Oct/Nov 2024

24 Methane, ethane and propane are all members of the same homologous series. Which statement about these compounds is correct? A They contain double carbon–carbon covalent bonds. B They have different general formulas. C They have the same molecular structure. D They react in similar ways.

1 marks

Answer: D

This question in 0653/23 May/June 2025

24 The structures of some compounds are shown. H H H H H H H C H H C C H H C C C H H H H H H H Which statement about these compounds is correct? A They have the same boiling point. B They are in the same homologous series. C They are unsaturated. D They have different chemical properties.

1 marks

Answer: B

This question in 0653/23 Oct/Nov 2025