plumiAlkanes and alkenes: Edexcel GCSE Chemistry questions
Every Edexcel GCSE Chemistry exam question on Alkanes and alkenes (specification points 9.10–9.16), 2018–2025, with its mark scheme and examiner’s report.
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Q1(c)
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Q4(b)(iii)
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Q9(a)(i)
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Q10(b)(ii)
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Q5(a)(iv)
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Q7(a)(ii)
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Q7(c)
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Q7(a)(i)
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Q7(a)(ii)
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All 47 questions on Alkanes and alkenes, as a list
- June 2025, Paper 2 Higher, Q1(c) (2 marks): Yellow bananas emit ethene gas, C2H4 . Draw one molecule of ethene, showing all covalent bonds. (2)
- June 2025, Paper 2 Higher, Q7(b) (1 mark): A molecule in an homologous series has the formula C9H21N. What is the formula of the next molecule in this homologous series? (1) A C10H21N B C10H23N C C10H21N
- June 2025, Paper 2 Foundation, Q4(a)(i) (2 marks): Explain which compound, A, B or C, is an alkene. (2)
- June 2025, Paper 2 Foundation, Q4(b)(i) (1 mark): State the meaning of the hazard symbol shown. (1)
- June 2025, Paper 2 Foundation, Q4(b)(ii) (1 mark): Name the orange solution used to distinguish between compounds B and C. (1)
- June 2025, Paper 2 Foundation, Q4(b)(iii) (1 mark): What is the final appearance of the mixture when compound B is shaken with a few drops of the orange solution? (1) A colourless B green C purple D red
- June 2025, Paper 2 Foundation, Q9(a)(i) (1 mark): The majority of hydrocarbons in crude oil belong to one homologous series. Give the name of this series. (1)
- June 2024, Paper 2 Higher, Q5(a)(i) (2 marks): Most hydrocarbons found in fossil fuels are members of the alkane homologous series. State two features of an homologous series. (2) 1 2
- June 2024, Paper 2 Higher, Q5(a)(ii) (1 mark): Which molecule is in the same homologous series as CH4? (1) A C5H20 B C6H12 C C8H18 D C9H16
- June 2024, Paper 2 Higher, Q10(b)(ii) (3 marks): Explain what is seen when a few drops of bromine water are shaken with phenylethene. (3)
- June 2024, Paper 2 Foundation, Q5(a)(iv) (1 mark): Which of the compounds in Figure 9 have the same molecular formula? (1) A none of them B X and Y only C X and Z only D X, Y and Z
- June 2024, Paper 2 Foundation, Q7(a)(ii) (2 marks): Explain why compound L is an alkene. (2)
- June 2024, Paper 2 Foundation, Q7(c) (6 marks): Figure 13 shows information about four compounds, E, F, G and H. The compounds are in no particular order • butane • carbon dioxide • ethane • ethene. boiling p
- June 2023, Paper 2 Higher, Q7(a)(i) (1 mark): Each molecule in Figure 12 contains a different functional group. Circle the alkene functional group in propene. (1)
- June 2023, Paper 2 Higher, Q7(a)(ii) (2 marks): Propene reacts with bromine water. Complete the equation for the reaction of propene with bromine by drawing the structure of a molecule of the product. (2) H H
- June 2023, Paper 2 Foundation, Q7(b)(i) (2 marks): Complete Figure 13 to show the structure of one molecule of propane and the formula of butane. (2) alkane formula structure of one molecule propane C3H8 H H H H
- June 2022, Paper 2 Higher, Q5(b)(ii) (1 mark): Which one of the following hydrocarbons belongs to the same homologous series as octane, C8H18? (1) A C4H6 B C4H8 C C4H10 D C4H12
- June 2022, Paper 2 Higher, Q10(a)(i) (1 mark): Give the name of hydrocarbon Z shown in Figure 14. (1)
- June 2022, Paper 2 Higher, Q10(a)(ii) (2 marks): Complete the balanced equation for the reaction of hydrocarbon Z, C4H8, with bromine. (2) C4H8 + →
- June 2022, Paper 2 Foundation, Q7(a) (1 mark): What is the molecular formula of the compound in Figure 10? (1) A CH B CH2 C 3C6H D C3H6
- June 2022, Paper 2 Foundation, Q7(b) (3 marks): The compound in Figure 10 is an unsaturated hydrocarbon. State why the compound is described as an unsaturated hydrocarbon. (3) unsaturated . hydrocarbon .
- November 2021, Paper 2 Higher, Q4(b)(i) (1 mark): On Figure 5, draw a circle around the functional group in this molecule. (1)
- November 2021, Paper 2 Higher, Q10(a)(ii) (3 marks): Compound Y can also be formed in the following reaction C3H8 C3H6 → + H2 compound X compound Y Explain how bromine water can be used to distinguish between comp
- November 2021, Paper 2 Foundation, Q9(b) (1 mark): Diesel oil contains alkanes. These alkanes are part of an homologous series. Which statement about compounds in this homologous series is true? (1) A they have
- November 2020, Paper 2 Higher, Q4(a)(iii) (1 mark): Separate samples of dichloroethene and poly(dichloroethene) are shaken with a few drops of bromine water. What would be seen? (1) A both mixtures remain orange
- November 2020, Paper 2 Higher, Q4(b) (2 marks): Dichloroethene is produced from ethene and chlorine. In the overall reaction, ethene reacts with chlorine and forms dichloroethene and hydrogen chloride. Comple
- November 2020, Paper 2 Foundation, Q10(a)(iii) (1 mark): Separate samples of dichloroethene and poly(dichloroethene) are shaken with a few drops of bromine water. What would be seen? (1) A both mixtures remain orange
- November 2020, Paper 2 Foundation, Q10(b) (2 marks): Dichloroethene is produced from ethene and chlorine. In the overall reaction, ethene reacts with chlorine and forms dichloroethene and hydrogen chloride. Comple
- June 2019, Paper 2 Higher, Q2(c)(i) (2 marks): Explain, using these formulae, why butane and pentane are neighbouring members of the same homologous series. (2)
- June 2019, Paper 2 Higher, Q7(a) (2 marks): Explain why ethene is an unsaturated hydrocarbon. (2)
- June 2019, Paper 2 Higher, Q7(b) (3 marks): A sample of ethene is burned completely in oxygen. Write the balanced equation for this reaction. (3)
- June 2019, Paper 2 Higher, Q7(c) (3 marks): Ethene can be polymerised to form poly(ethene). Describe what you would see when a sample of ethene and a sample of poly(ethene) are shaken with separate, small
- June 2019, Paper 2 Foundation, Q5(c) (2 marks): Substance X is an unsaturated hydrocarbon. The structure of a molecule of substance X is shown in Figure 10. H H H H H C C C C H C C H H H H H C H H H Figure 10
- June 2019, Paper 2 Foundation, Q5(d) (2 marks): Two liquid hydrocarbons, A and B, were tested with bromine water. One hydrocarbon was known to be an alkane. The other hydrocarbon was known to be an alkene. Ea
- June 2019, Paper 2 Foundation, Q8(c)(i) (2 marks): Explain, using these formulae, why butane and pentane are neighbouring members of the same homologous series. (2)
- June 2018, Paper 2 Higher, Q6(b)(i) (1 mark): Which of the following is the general formula of an alkane? (1) A CnH2n B CnH2n +1 C CnH2n −1 D CnH2n +2
- June 2018, Paper 2 Higher, Q10(b) (6 marks): A student is provided with unlabelled samples of three liquids. The three liquids are known to be hexane, C6H14, a liquid alkane hexene, C6H12, a liquid alkene
- June 2018, Paper 2 Foundation, Q4(b)(i) (3 marks): A small volume of bromine water is added to each of the substances A, B and C and the mixtures shaken. Explain why A and B decolourise bromine water but C does
- June 2018, Paper 2 Foundation, Q4(b)(ii) (2 marks): Ethane, C2H6, is a hydrocarbon. Draw a molecule of ethane showing all covalent bonds. (2)
- Specimen, Paper 2 Higher, Q4(b) (2 marks): Figure 5 shows some information about the alkenes, ethene and propene. Complete the table. The structure of propene must show all covalent bonds. (2) name of al
- Specimen, Paper 2 Higher, Q4(c)(ii) (1 mark): What type of reaction takes place between butene and steam? (1) A addition B dehydration C neutralisation D substitution
- Specimen, Paper 2 Higher, Q4(d) (2 marks): A sample of each of three hydrocarbons, X, Y and Z, was shaken with bromine water. Bromine water is orange coloured. The results are: X orange mixture becomes c
- Specimen, Paper 2 Foundation, Q9(b) (1 mark): The graph in Figure 13 shows the boiling points of some alkanes plotted against the number of carbon atoms in one molecule of each alkane. 100 boiling point / °
- Specimen, Paper 2 Foundation, Q9(c) (2 marks): Figure 14 shows some information about the alkenes, ethene and propene. Complete the table. The structure of propene must show all covalent bonds. (2) name of a
- Specimen, Paper 2 Foundation, Q9(d) (1 mark): Alkenes burn completely to produce carbon dioxide and water. Balance the equation for the complete combustion of butene gas, C4H8. (1) C4H8 + O2 → CO2 + H2O
- Specimen, Paper 2 Foundation, Q9(e)(ii) (1 mark): What type of reaction takes place between butene and steam? (1) A addition B dehydration C neutralisation D substitution
- Specimen, Paper 2 Foundation, Q9(f) (2 marks): A sample of each of three hydrocarbons, X, Y and Z, was shaken with bromine water. Bromine water is orange coloured. The results are: X orange mixture becomes c
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