A-LevelChemistryHydrocarbonsFeb/Mar 2017Paper 1 Q211 Mark

Kerosene is used as an aircraft fuel. Q is one of the molecules in kerosene and has the skeletal formula shown. [Figure showing skeletal formula of Q, which is 2,3-dimethylbutane]. Other structural isomers of this molecule are also found in kerosene. Which structure is a structural isomer of Q?

Q: What topic does this question test?

This question tests Hydrocarbons in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

A[Skeletal structure of 2-methylpentane]

B[Skeletal structure of 3-methylpentane]

C[Skeletal structure of hexane]

D[Skeletal structure of 2,2-dimethylbutane]

✓ Correct Answer

The correct answer is D: [Skeletal structure of 2,2-dimethylbutane]

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Chemistry Question

Topic

This multiple-choice question tests Hydrocarbons in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Chemistry Feb/Mar 2017 examination, Paper 1 Variant 2.

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