Formulae, functional groups and terminology: past paper questions

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• Question 34May/June 2026, paper 11Multiple choice1 mark

  The structures of four different organic compounds are shown. How many different homologous series are represented by these compounds?

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• Question 30Oct/Nov 2025, paper 11Multiple choice1 mark

  Which group of compounds have the same general formula?

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• Question 35Oct/Nov 2024, paper 11Multiple choice1 mark

  Which statements about homologous series are correct?

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• Question 32Oct/Nov 2023, paper 11Multiple choice1 markHas a diagram

  The structures of three organic molecules are shown. Which description of the three molecules is correct?

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• Question 31May/June 2026, paper 12Multiple choice1 mark

  Ethane, ethene, ethanol and ethanoic acid are all organic compounds. Which compounds are hydrocarbons?

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• Question 35Oct/Nov 2025, paper 12Multiple choice1 markHas a diagram

  L and M are different homologous series. The first three members of homologous series L all decolourise aqueous bromine. The first three members of homologous series M all dissolve in water to give solutions with a pH below 7.

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• Question 36Oct/Nov 2024, paper 11Multiple choice1 markHas a diagram

  The formulae of two organic compounds, P and Q, are shown.

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• Question 37Oct/Nov 2023, paper 11Multiple choice1 markHas a diagram

  Which diagram shows the displayed formula of ethanol?

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• Question 9May/June 2026, paper 13Multiple choice1 markHas a diagram

  The diagram shows a model of an organic molecule. What is the molecular formula of this organic molecule?

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• Question 36Oct/Nov 2025, paper 12Multiple choice1 mark

  Which structure represents an unsaturated hydrocarbon?

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• Question 34Oct/Nov 2024, paper 12Multiple choice1 markHas a diagram

  Which structure represents a molecule of ethanol?

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• Question 8Oct/Nov 2023, paper 12Multiple choice1 markHas a diagram

  The diagram shows the structure of a molecule of ethyl ethanoate. What is the molecular formula of a molecule of ethyl ethanoate?

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• Question 33May/June 2026, paper 13Multiple choice1 mark

  What is the general formula of the alcohol homologous series?

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• Question 30Oct/Nov 2025, paper 13Multiple choice1 mark

  The molecular formulae of four compounds are shown. $${\text{C}}_2{\text{H}}_2{\text{C}}_3{\text{H}}_8{\text{C}}_4{\text{H}}_8{\text{C}}_5{\text{H}}_{10}$$ How many of these compounds are in the alkane homologous series?

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• Question 35Oct/Nov 2024, paper 12Multiple choice1 mark

  Which statement describes a homologous series?

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• Question 34Oct/Nov 2023, paper 12Multiple choice1 markHas a diagram

  Which diagram shows the displayed formula for the named organic compound?

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• Question 31May/June 2026, paper 21Multiple choice1 mark

  Which statement about members of the carboxylic acid homologous series is correct?

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• Question 33Oct/Nov 2025, paper 21Multiple choice1 markHas a diagram

  Which structure represents a compound in the alcohol homologous series?

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• Question 35Oct/Nov 2024, paper 13Multiple choice1 markHas a diagram

  Which row gives the relative molecular mass, $M_{\text{r}}$, of the first member of the named homologous series?

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• Question 31Oct/Nov 2023, paper 21Multiple choice1 markHas a diagram

  The structures of two molecules, X and Y, are shown.

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• Question 32May/June 2026, paper 21Multiple choice1 mark

  Which of the named compounds have the correct structural formula?

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• Question 32Oct/Nov 2025, paper 22Multiple choice1 mark

  The alkenes are a homologous series. Which statement about the members of the homologous series of the alkenes is correct?

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• Question 29Oct/Nov 2024, paper 21Multiple choice1 mark

  Four statements about members of the same homologous series are listed. 1 They have the same volatility. 2 They have the same molecular formula.

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• Question 32May/June 2026, paper 22Multiple choice1 mark

  The formulas of two hydrocarbons are shown. Which statement about these hydrocarbons is correct?

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• Question 34Oct/Nov 2025, paper 22Multiple choice1 markHas a diagram

  Which structures are structural isomers of each other?

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• Question 30Oct/Nov 2024, paper 21Multiple choice1 markHas a diagram

  Ethene reacts with steam to produce ethanol. Which row describes each compound?

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• Question 33May/June 2026, paper 22Multiple choice1 mark

  The names and structures of four organic compounds are shown.

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• Question 9Oct/Nov 2025, paper 23Multiple choice1 mark

  Which compound has an empirical formula that is the same as its molecular formula?

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• Question 31Oct/Nov 2024, paper 22Multiple choice1 mark

  Which statement explains why ethanoic acid is saturated?

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• Question 33Oct/Nov 2023, paper 23Multiple choice1 mark

  Which pair of compounds are structural isomers of each other?

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