A-LevelChemistryAtoms, molecules and stoichiometryOct/Nov 2010Paper 1 Q391 Mark
Use of the Data Booklet is relevant for this question. In an organic synthesis, a 62% yield of product is achieved. Which of these conversions are consistent with this information? 1 74.00 g of butan-2-ol → 44.64 g of butanone 2 74.00 g of butan-1-ol → 54.56 g of butanoic acid 3 74.00 g of 2-methylpropan-1-ol → 54.56 g of 2-methylpropanoic acid
A1, 2 and 3 are correct
B1 and 2 only are correct
C2 and 3 only are correct
D1 only is correct
✓ Correct Answer
The correct answer is A: 1, 2 and 3 are correct
📋 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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