plumiIntroduction to organic chemistry: Edexcel A‑Level Chemistry questions
Every Edexcel A-Level Chemistry exam question on 6A Introduction to organic chemistry, 2016–2025, with its mark scheme and examiner’s report.
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All 51 questions on Introduction to organic chemistry, as a list
- June 2025, Paper 2, Q3(b) (1 mark): What is the IUPAC name for glycerol? (1) A 1,2,3‑trihydroxypropane B propanetriol C 2,3‑dihydroxypropan‑1‑ol D propane‑1,2,3‑triol
- June 2025, Paper 2, Q8(a) (1 mark): Give the molecular formula of anethole. (1)
- June 2025, AS Paper 2, Q1(a) (1 mark): What is the molecular formula of myrcene? (1) A C5H5 B C5H8 C C10H10 D C10H16
- June 2025, AS Paper 2, Q1(c) (1 mark): Myrcene is a dimer of isoprene. Isoprene has the skeletal formula shown. Which is the IUPAC name for isoprene? (1) A 2‑methylbut‑1,3‑ene B 2‑methylbuta‑1,3‑dien
- June 2025, AS Paper 2, Q2 (1 mark): Which compound must be named using the E/Z system and could not be named using the cis/trans system? A HOOC CH2 CH2 COOH B HOOC CH2 CBr CH COOH C HOOC CH2 CBr C
- June 2025, AS Paper 2, Q6(e) (2 marks): The organic product formed when butan‑1‑ol is partially oxidised is isomeric with the butanone synthesised in (b). Give the structural and molecular formulae of
- June 2024, Paper 2, Q7(a) (1 mark): What is the IUPAC name of chloroprene? (1) A 3‑chlorobuta‑1,3‑diene B 2‑chlorobuta‑2,4‑diene C 3‑chlorobuta‑2,4‑diene D 2‑chlorobuta‑1,3‑diene
- June 2024, AS Paper 2, Q3(a) (1 mark): Give the molecular formula and empirical formula of but‑1‑ene. (1) Molecular formula Empirical formula
- June 2024, AS Paper 2, Q3(c)(i) (2 marks): Give the displayed formula and name of each of these isomers. (2) Isomer 1 Isomer 2 Name Name
- June 2024, AS Paper 2, Q3(c)(ii) (2 marks): Explain how the presence of the double bond in but‑2‑ene results in these two isomers. (2)
- June 2023, Paper 2, Q1(a) (1 mark): Draw the skeletal formula of 1,3‑dimethylcyclohexane. (1)
- June 2023, Paper 2, Q1(b) (1 mark): What is the general formula for a cycloalkene? (1) A CnH2n–2 B CnH2n C CnH2n+1 D CnH2n+2
- June 2023, Paper 2, Q8(a) (1 mark): How many structural isomers are there with the formula C5H12? (1) A 2 B 3 C 4 D 5
- June 2023, AS Paper 2, Q2(a) (2 marks): Hexane is a saturated hydrocarbon. State what is meant by the term ‘saturated hydrocarbon’. Your answer should refer to both words in the term. (2)
- June 2023, AS Paper 2, Q3(a) (3 marks): Alkenes have the same general formula as cycloalkanes. Explain why this general formula is different from that of alkanes. Include the general formulae in your
- June 2023, AS Paper 2, Q3(b) (1 mark): Draw the skeletal formula of cyclohexene. (1)
- June 2022, Paper 2, Q2(a) (1 mark): State what is meant by the term hydrocarbon. (1)
- June 2022, Paper 2, Q2(c) (1 mark): The heterolytic bond fission of a sigma (σ) bond in an alkane would produce (1) A only carbocations B only free radicals C free radicals and ions D ions
- June 2022, Paper 2, Q3(a)(ii) (1 mark): Give the name of the dihalogenoalkane produced. (1)
- June 2022, Paper 2, Q8(b) (1 mark): State the molecular formula of amyl acetate. (1)
- November 2021, Paper 2, Q5(a) (2 marks): Name the three functional groups present in compound X. (2)
- November 2021, Paper 3, Q6(d)(i) (1 mark): Give the molecular formula of paracetamol. (1)
- November 2021, AS Paper 2, Q1 (1 mark): The structures of two isomers are shown. What kind of isomerism is shown by these molecules? A carbon chain B positional C E/Z D cis/trans
- November 2021, AS Paper 2, Q7(a) (1 mark): State what is meant by a homologous series. You may use the alcohols in the table to illustrate your answer. (1)
- October 2020, Paper 2, Q2(a) (1 mark): Which of these has the molecular formula C6H10? (1) A B C D
- October 2020, Paper 2, Q2(b) (1 mark): What is the systematic name of this alkene? CH3 HC CH3 H2C C CH3 (1) A 2-methylpent-1-ene B 3-methylpent-1-ene C 2,3-dimethylbut-1-ene D 2,3-dimethylbut-3-ene
- October 2020, Paper 2, Q5(a) (1 mark): Which of these molecular formulae represents a non-cyclic, saturated hydrocarbon? (1) A C6H6 B C6H10 C C6H12 D C6H14
- October 2020, Paper 2, Q5(b) (1 mark): How many structural isomers are there with the molecular formula C5H12? . (1) A 2 B 3 C 4 D 5
- October 2020, AS Paper 2, Q1(a) (1 mark): The use of chlorofluorocarbons as refrigerants has ceased due to concerns about their effects on the ozone layer. One such compound is dichlorodifluoromethane.
- October 2020, AS Paper 2, Q2(a) (2 marks): Complete the table. (2) Name Skeletal formula OH OH butan‑2‑ol 2‑methylpropan‑1‑ol OH 2‑methylpropan‑2‑ol
- October 2020, AS Paper 2, Q2(b)(ii) (2 marks): When butan‑2‑ol reacts with concentrated phosphoric acid, two stereoisomers are formed. Explain what is meant by the term stereoisomers. (2)
- October 2020, AS Paper 2, Q2(b)(iii) (2 marks): Draw the structures and give the names of the two stereoisomers. (2) Stereoisomer 1 Stereoisomer 2 Name: Name:
- October 2020, AS Paper 2, Q2(b)(iv) (1 mark): Name this type of stereoisomerism. (1)
- June 2019, Paper 2, Q2(a): What is the IUPAC name for this alkane? A 4-ethyloctane B 5-ethyloctane C 3-propylheptane • D 5-propylheptane
- June 2019, AS Paper 2, Q2(a)(i) (2 marks): Describe two characteristics of a homologous series. (2)
- June 2019, AS Paper 2, Q2(a)(ii) (1 mark): Name the homologous series to which propene belongs. (1)
- June 2019, AS Paper 2, Q2(c)(ii) (2 marks): Under appropriate conditions, 2-chloropropane can be converted into a structural isomer of butanenitrile. State what is meant by the term ‘structural isomer’. (
- June 2019, AS Paper 2, Q2(c)(iii) (2 marks): Give the displayed formula and systematic name of the isomer of butanenitrile formed in (c)(ii). You must show all the bonds. (2) Displayed formula Name
- June 2019, AS Paper 2, Q7(b) (6 marks): Three different compounds, A, B and C, have the molecular formula C4H8O. Information about these three compounds includes: Ɣ all three compounds have infrared a
- June 2018, Paper 2, Q1(d) (1 mark): The skeletal formula of decalin is The molecular formula of decalin is (1) A C10H22 B C10H20 C C10H18 D C10H16
- June 2018, Paper 2, Q8(b)(iii) (1 mark): Draw two structural isomers of 4-nitrophenol which have a benzene ring. (1)
- June 2018, AS Paper 2, Q5(a)(ii) (1 mark): The reaction of propene with hydrogen chloride can produce two isomeric products: Cl CH3 CH2 CH2 Cl CH3 CH CH3 1-chloropropane 2-chloropropane 1-chloropropane a
- June 2018, AS Paper 2, Q8(a) (1 mark): Draw the fully displayed formula of 2-methylpropan-2-ol. (1)
- June 2017, Paper 2, Q1(b) (1 mark): What is the name of this alkane? (1) A 2-ethyl-3-propylpentane B 4-ethyl-3-methylheptane C 3-methyl-4-propylhexane D 4-methyl-3-propylhexane
- June 2017, Paper 3, Q2(b) (2 marks): Draw the skeletal formulae for 3-methylbutan-2-ol and 3-methylbutan-2-one. (2) 3-methylbutan-2-ol 3-methylbutan-2-one
- June 2017, AS Paper 2, Q4(a) (2 marks): The characteristic smell of pine wood is due, partly, to the presence of a group of compounds called terpenes. One of the simpler terpenes is a compound called
- June 2017, AS Paper 2, Q4(e) (2 marks): Some plants are able to make terpenes by linking together several molecules of 2-methylbuta-1,3-diene, also known as isoprene. The skeletal formula of 2-methylb
- June 2017, AS Paper 2, Q8(a) (2 marks): Give the structures of propane-1,3-diol and another diol which is an isomer of propane-1,3-diol. (2)
- June 2016, AS Paper 2, Q1(a) (1 mark): What is the name of this compound? (1) A 1,1,2-trimethylpentane B 2,3-dimethylhexane C 4,5-dimethylhexane D 4,5,5-trimethylpentane
- June 2016, AS Paper 2, Q1(b) (1 mark): The number of structural isomers with the molecular formula C5H12 is (1) A 3 B 4 C 5 D 6
- June 2016, AS Paper 2, Q7(b)(ii) (3 marks): Draw the displayed formulae of the four possible structural isomers that could be alcohol X. (3) Alcohol 1 Alcohol 2 Alcohol 3 Alcohol 4
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