O-LevelChemistryOrganic Chemistry5070/11 · Oct/Nov 2020 · Q361 Mark

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

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AStructure A (but-2-ene)

BStructure B (2-methylpropene)

CStructure C (2-methylbutane)

DStructure D (3-methylpent-1-ene)

✓ Correct answer

B: Structure B (2-methylpropene)

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Topic: Organic Chemistry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2020 Paper 1 Variant 1, question 36.

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