O-LevelChemistryOrganic Chemistry5070/11 · Oct/Nov 2025 · Q311 Mark

P is a branched hydrocarbon with the ratio of carbon atoms to hydrogen atoms being 1:2. P has a relative molecular mass of 56. What is the identity of P?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

A[Structure A]

B[Structure B]

C[Structure C]

D[Structure D]

✓ Correct answer

B: [Structure B]

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Topic: Organic Chemistry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2025 Paper 1 Variant 1, question 31.

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