A-LevelChemistryAtoms, molecules and stoichiometryMay/June 2016Paper 1 Q311 Mark
In an experiment, 10 cm³ of an organic compound, J, in the gaseous state was sparked with an excess of oxygen. 20 cm³ of carbon dioxide and 5 cm³ of nitrogen were obtained among the products. All gas volumes were measured at the same temperature and pressure. What could be the identity of J? 1 C₂H₆N₂ 2 C₂H₃N 3 C₂H₇N
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 C: 2 and 3 only 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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