A-LevelChemistryCarbonyl compoundsOct/Nov 2016Paper 1 Q281 Mark
Which row correctly describes the reactivity of aldehydes and ketones?
Awith NaBH₄: both react; with H⁺/Cr₂O₇²⁻(aq): both react
Bwith NaBH₄: both react; with H⁺/Cr₂O₇²⁻(aq): only aldehydes react
Cwith NaBH₄: only ketones react; with H⁺/Cr₂O₇²⁻(aq): both react
Dwith NaBH₄: only ketones react; with H⁺/Cr₂O₇²⁻(aq): only aldehydes react
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of carbonyl compounds within the Chemistrysyllabus. The examiner's mark scheme requires...
📋 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...
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