A-LevelChemistryIntroduction to organic chemistryFeb/Mar 2024Paper 1 Q251 Mark
The diagram shows the structure of the naturally occurring molecule cholesterol. [Figure showing the skeletal structure of cholesterol] Student X stated that the 17 carbon atoms in the 4 rings all lie in the same plane. Student Y stated that this molecule displays cis/trans isomerism at the C=C double bond. Which students are correct?
Aboth student X and student Y
Bneither student X nor student Y
Cstudent X only
Dstudent Y only
✓ Correct Answer
The correct answer is B: neither student X nor student Y
📋 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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