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A Level Chemistry 9701, topic 29.4

Isomerism: optical: past paper questions

10 Cambridge A Level Chemistry 9701 questions on Isomerism: optical (29.4) from 10 papers, 2023 to 2026. Open the paper or try a question free.

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Questions
10
Papers
10
Years
2023 to 2026
Total marks
105
Average per question
10.5 marks
Largest question
16 marks

By type: Structured 10

How hard the questions are

  • Recall0
  • Apply4
  • Analyse6
  • Not banded0

Derived from the command word Cambridge prints in each question, banded by a fixed table beside the syllabus's own definitions. A question printing no command word is unbanded: unknown, not middling.

Command words

  • drawApply9 questions
  • completeApply5 questions
  • explainAnalyse5 questions

    set out purposes or reasons / make the relationships between things evident / provide why and/or how and support with relevant evidence

  • nameRecall4 questions
  • stateRecall4 questions

    express in clear terms

  • describeApply3 questions

    state the points of a topic / give characteristics and main features

  • suggestAnalyse3 questions

    apply knowledge and understanding to situations where there are a range of valid responses in order to make proposals / put forward considerations

  • defineRecall2 questions

    give precise meaning

  • identifyRecall2 questions

    name/select/recognise

  • showApply1 question

Where the questions come from

By year

  • 20262
  • 20252
  • 20243
  • 20233

By session

  • May/June8
  • Oct/Nov2

By paper

  • Paper 410

Questions on this topic

Showing 9 of 10, spread across the years. Open one to write your answer and have it marked.

  • Question 7May/June 2026, paper 42Structured11 marksHas a diagram

    Alanine, CH3CH(NH2)COOH, is an amino acid that contains a chiral centre. Different synthetic routes to produce alanine can lead to the formation of an optically active sample or a racemic mixture. Describe what is meant by optically active.

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  • Question 8Oct/Nov 2025, paper 42Structured16 marks

    Asparagine and aspartic acid are two naturally occurring amino acids. Their structures and isoelectric points are shown in Table 8.1.

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  • Question 8Oct/Nov 2024, paper 42Structured12 marksHas a diagram

    The amino acid serine, HOCH2CH(NH2)COOH, exists in two optically active forms. These optical isomers, isomer P and isomer Q, are shown in Fig. 8.1.

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  • Question 6May/June 2023, paper 41Structured10 marksHas a diagram

    Compound H has the structural formula CH2=CHCH(NH2)COOH. Name all the functional groups in H.

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  • Question 9May/June 2026, paper 43Structured11 marksHas a diagram

    An amino acid is a compound that has both an amine group and a carboxyl group. The structures of three amino acids, P, Q and R, are shown in Figure 9.1.

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  • Question 7May/June 2025, paper 42Structured11 marksHas a diagram

    2-aminobutane, CH3CH(NH2)CH2CH3, exists as a mixture of two enantiomers. Define enantiomers.

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  • Question 8May/June 2024, paper 41Structured8 marksHas a diagram

    Neotame is an artificial sweetener added to some foods. Fig. 8.1 State the number of chiral carbon atoms in a molecule of neotame.

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  • Question 6May/June 2023, paper 42Structured8 marksHas a diagram

    Perindopril is a drug used to treat heart disease. State the number of chiral carbon atoms present in one molecule of perindopril.

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  • Question 8May/June 2024, paper 43Structured8 marksHas a diagram

    Neotame is an artificial sweetener added to some foods. State the number of chiral carbon atoms in a molecule of neotame.

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