Formulas, functional groups and the naming of organic compounds: past paper questions

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• Question 25May/June 2026, paper 11Multiple choice1 markHas a diagram

  The formula of 11-cis-retinal is ${\text{C}}_{20}{\text{H}}_{28}\text{O}$. The structure of 11-cis-retinal consists of a cyclohexene ring and a long aliphatic side chain ending in an aldehyde group. The long aliphatic side chain contains one or more $\text{C}=\text{C}$ bonds.

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• Question 26Oct/Nov 2025, paper 11Multiple choice1 markHas a diagram

  The skeletal formulas of two compounds are shown. progesterone and testosterone Which statements about progesterone and testosterone are correct?

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• Question 38Oct/Nov 2024, paper 13Multiple choice1 markHas a diagram

  $({\mathrm{C}\mathrm{H}}_3{)}_3\mathrm{C}\mathrm{C}\mathrm{N}$ reacts to form alcohol Y via the reaction sequence shown.

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• Question 25Oct/Nov 2023, paper 11Multiple choice1 markHas a diagram

  Hexamine is a crystalline solid used as a fuel in portable stoves. The diagram shows its skeletal structure. What is the empirical formula of hexamine?

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• Question 26May/June 2026, paper 11Multiple choice1 mark

  Which compound has the empirical formula ${\text{CH}}_2\text{O}$?

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• Question 26Oct/Nov 2025, paper 13Multiple choice1 markHas a diagram

  The skeletal formulas of two compounds are shown. progesterone [skeletal formula of progesterone] testosterone [skeletal formula of testosterone] Which statements about progesterone and testosterone are correct?

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• Question 27May/June 2024, paper 11Multiple choice1 markHas a diagram

  The diagram shows the skeletal formula of citric acid. What is the molecular formula of citric acid?

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• Question 28Oct/Nov 2023, paper 12Multiple choice1 markHas a diagram

  Which row shows the correct name and classification of the halogenoalkane shown?

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• Question 25May/June 2026, paper 13Multiple choice1 markHas a diagram

  The skeletal structure of hexamine is shown. What is the empirical formula of hexamine?

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• Question 15May/June 2025, paper 12Multiple choice1 markHas a diagram

  The skeletal formulae of arginine and lysine are shown. [Skeletal formulae of arginine and lysine] Which row is correct?

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• Question 24May/June 2024, paper 12Multiple choice1 mark

  In the general formula of which class of compound is the ratio of hydrogen atoms to carbon atoms the highest?

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• Question 39May/June 2025, paper 13Multiple choice1 mark

  An organic compound, T, contains only one functional group. Compound T has the empirical formula ${\text{C}}_2{\text{H}}_4\text{O}$. Some functional groups are listed.

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• Question 26May/June 2024, paper 13Multiple choice1 mark

  What is the correct name of the major product of the reaction of $\mathrm{H}\mathrm{B}\mathrm{r}$ with 3-ethylhex-3-ene?

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• Question 37Oct/Nov 2023, paper 13Multiple choice1 markHas a diagram

  Ethanal, ${\text{CH}}_3\text{CHO}$, undergoes an addition reaction with $\text{HCN}$ in the presence of ${\text{CN}}^{-}$ ions. Which row identifies the type of reaction and the name of the product formed?

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• Question 25May/June 2023, paper 12Multiple choice1 markHas a diagram

  Which compound has the molecular formula ${\text{C}}_6{\text{H}}_{10}\text{O}$?

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• Question 28May/June 2023, paper 13Multiple choice1 markHas a diagram

  Which compound is a secondary alcohol that can be dehydrated to form an alkene with $M_r=70$?

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