A-LevelChemistryPolymerisation9701/12 · Feb/Mar 2025 · Q291 Mark

The structure of compound G is shown. Compound G undergoes addition polymerisation. Which diagram shows the repeat unit of the polymer formed?

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ARepeat unit showing a saturated backbone -CH2-C- with side groups C≡N and -C(=O)OCH3 on the second carbon.

BRepeat unit showing a saturated backbone -CH2-C- with side groups H and -C(=O)OCH3 on the second carbon (C≡N not shown).

CRepeat unit showing a saturated backbone -CH2-C- with side groups C≡N and -C(=O)OCH3 on the second carbon.

DRepeat unit showing a rearranged structure including a -C(=O)CH2- group, a C(=CH2) group, and a C≡N group.

✓ Correct answer

C: Repeat unit showing a saturated backbone -CH2-C- with side groups C≡N and -C(=O)OCH3 on the second carbon.

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Topic: Polymerisation, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2025 Paper 1 Variant 2, question 29.

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