plumiNaming and representing organic compounds: OCR A‑Level Chemistry A questions
OCR A-Level Chemistry A past-paper questions on 4.1.1.1 Naming and representing organic compounds, 2016–2025, with mark schemes and examiner’s reports where available.
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All 45 questions on Naming and representing organic compounds, as a list
- June 2025, Paper 2, Q3 (1 mark): The skeletal structure of a medicinal drug is shown below. How many hydrogen atoms are in its molecular formula? H N Cl Cl A 14 B 15 C 17 D 19 Your answer [1]
- June 2025, Paper 2, Q16(a) (1 mark): Compound A is a hydrocarbon: Compound A What is the systematic name of compound A? [1]
- June 2025, Paper 3, Q2(a)(i) (1 mark): Draw the skeletal formula of 2,3‑dimethylhexan‑1‑ol. [1]
- June 2025, Paper 3, Q5(a)(i) (1 mark): What is the systematic name of the alcohol C6H5CH2OH? [1]
- June 2025, AS Paper 2, Q4(c) (2 marks): Besides pentane, there are two other structural isomers of C5H12. Draw the skeletal formulae of these two other structural isomers and state the systematic name
- June 2024, Paper 3, Q2(c)(i) (1 mark): What is the molecular formula of compound B? [1]
- June 2024, AS Paper 1, Q14 (1 mark): What is the name of the compound below? Cl OH A 1‑chloro‑1,2‑dimethylpropan‑3‑ol B 2‑chloro‑3‑methylbutan‑4‑ol C 3‑chloro‑2‑methylbutan‑1‑ol D 3‑chloro‑2,3‑dime
- June 2023, Paper 2, Q5 (1 mark): Oxymetazoline, shown below, is used as a decongestant in the treatment of colds. HO N HN Oxymetazoline How many H atoms are in one molecule of oxymetazoline? A
- June 2023, Paper 2, Q7 (1 mark): What is the systematic name for the compound below? A 3,5-dimethylocta-1,3,6-triene B 3,5-dimethylocta-2,5,7-triene C 4,6-dimethylocta-1,3,6-triene D 4,6-dimeth
- June 2023, AS Paper 1, Q15 (1 mark): Which formula does not represent 3-methylbut-1-ene? A CH3CHCH3CHCH2 B CH2CHCH(CH3)2 C D Your answer [1]
- June 2023, AS Paper 2, Q5(a)(i) (1 mark): What is the systematic name of alcohol A? [1]
- June 2022, Paper 2, Q16(a)(i) (1 mark): What is the systematic name of hydrocarbon A? [1]
- June 2022, AS Paper 1, Q15 (1 mark): What is the number of hydrogen atoms in one molecule of the compound below? O OH A 8 B 10 C 12 D 14 Your answer [1]
- June 2022, AS Paper 1, Q21(a)(i) (1 mark): What is the systematic name for (CH3)3CCH=CH2? [1]
- November 2021, Paper 2, Q18(c)(i) (1 mark): What is the molecular formula of ibuprofen? [1]
- November 2021, Paper 2, Q19(a)(i) (1 mark): What is the systematic name for prenal? [1]
- November 2021, AS Paper 1, Q17 (1 mark): What is the systematic name of the compound below? OH A 3-methylhex-5-en-4-ol B 4-methylhex-1-en-3-ol C 2-ethylpent-4-en-3-ol D 4-ethylpent-1-en-3-ol Your answe
- November 2021, AS Paper 1, Q21(d)(i) (1 mark): The systematic name for halothane is 2-bromo-2-chloro-1,1,1-trifluoroethane. Draw the structure of a halothane molecule. [1]
- November 2021, AS Paper 2, Q7(c)(i) (1 mark): Compound A is a secondary alcohol. What is the systematic name of compound A? [1]
- November 2020, Paper 2, Q12 (1 mark): What is the molecular formula of the steroid molecule below? OH HO A C18H24O2 B C18H26O2 C C18H28O2 D C18H30O2 Your answer [1]
- November 2020, Paper 2, Q16(a) (1 mark): Hydrocarbon A can be reacted with bromine in the presence of ultraviolet radiation to prepare (CH3)3CCHBrCH3. What is the systematic name for (CH3)3CCHBrCH3? [1
- November 2020, AS Paper 1, Q14 (1 mark): Which statement is correct for the two structures below? A They have the same empirical formula. B They have different relative molecular masses. C They are str
- November 2020, AS Paper 1, Q25(c)(v) (1 mark): Draw the structure of 2,5-dimethylhept-3-yne. [1]
- November 2020, AS Paper 2, Q5(c) (1 mark): What is the systematic name of alcohol B? [1]
- June 2019, Paper 2, Q3 (1 mark): What is the name of the compound below? H CH3 C C H3C CH2 CH2 CH2 CH3 A 3-Propylpent-2-ene B 3-Propylpent-3-ene C 3-Ethylhex-2-ene D 4-Ethylhex-4-ene Your answe
- June 2019, Paper 2, Q16(b)(ii) (1 mark): What is the molecular formula of geraniol? [1]
- June 2019, Paper 2, Q18(a)(i) (1 mark): What is the systematic name of ester A? [1]
- June 2019, AS Paper 1, Q25(a)(ii) (1 mark): Write the systematic name for alcohol C. [1]
- June 2019, AS Paper 2, Q3(c)(i) (1 mark): Draw the structure of 2-iodo-2-methylbutane. [1]
- June 2018, Paper 2, Q16(a)(i) (1 mark): What is the systematic name of alcohol A? [1]
- June 2018, Paper 2, Q16(a)(ii) (1 mark): What is the structural formula of alcohol A? [1]
- June 2018, Paper 3, Q6(a)(i) (1 mark): Give the systematic name for compound A. [1]
- June 2018, AS Paper 1, Q17 (1 mark): The structure of naphthalene is shown below. What is the molecular formula of naphthalene? A C10H8 B C10H10 C C12H10 D C12H12 Your answer [1]
- June 2018, AS Paper 1, Q25(a)(ii) (1 mark): What is the systematic name of alcohol E? [1]
- June 2018, AS Paper 2, Q1(d)(ii) (1 mark): A is an organic acid, containing C, H and O only. One molecule of A contains two COOH groups. Suggest the structure of A. [1]
- June 2018, AS Paper 2, Q6(b)(i) (1 mark): Give the systematic name of compound D. [1]
- June 2017, Paper 2, Q9 (1 mark): What is the molecular formula of the compound below? A C7H10 B C7H12 C C7H14 D C7H16 Your answer [1]
- June 2017, Paper 2, Q16(b)(i) (1 mark): Name compound C. [1]
- June 2017, Paper 2, Q19(c)(ii) (1 mark): What is the name of compound K? [1]
- June 2017, Paper 3, Q3(c)(i) (1 mark): Suggest the structure for CH3COOOH. The COOOH functional group must be clearly displayed. [1]
- June 2017, Paper 3, Q5(a)(iii) (1 mark): When beer is exposed to light, 3-methylbut-2-ene-1-thiol is formed, which gives an unpleasant smell and flavour to the beer. Draw the skeletal formula for 3-met
- June 2017, AS Paper 1, Q14 (1 mark): What is the systematic name of the compound below? Br A E-2-bromobut-2-ene B Z-2-bromobut-2-ene C E-1,2-dimethyl-1-bromoethene D Z-1,2-dimethyl-1-bromoethene Yo
- June 2017, AS Paper 1, Q15 (1 mark): The skeletal formula of an organic compound is shown below. O OH What is the molecular formula of the organic compound? A C6H10O2 B C6H11O2 C C6H12O2 D C6H13O2
- June 2017, AS Paper 2, Q4(b)(i) (1 mark): Give the systematic name of alcohol C. [1]
- June 2016, AS Paper 1, Q14 (1 mark): What is the name of the following compound? Cl Cl H3C C C CH3 H CH3 A 1,2-dichloro-1,2-dimethylpropane B 2,3-dichloro-2,3-dimethylpropane C 2,3-dichloro-2-methy
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