Compound X has molecular formula C4H10O. Separate samples of X are tested with three different reagents. Which results could not be obtained?
✓ Correct Answer
The correct answer is D: Tollens' reagent: silver mirror forms, 2,4-dinitrophenylhydrazine reagent: no change, warm acidified potassium dichromate(VI) solution: colour changes from orange to green
📋 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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