A-LevelChemistryCarbonyl compoundsOct/Nov 2016Paper 1 Q391 Mark
The compound shown is produced when sugar burns. [Figure showing structure of H3C-C(=O)-CHO] Which reagents would give a positive result with this compound? 1 alkaline aqueous iodine 2 2,4-dinitrophenylhydrazine 3 Fehling's solution
A1, 2 and 3 are correct
B1 and 2 only are correct
C2 and 3 only are correct
D1 only is correct
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The correct answer is A. This question tests the candidate's understanding of carbonyl compounds within the Chemistrysyllabus. The examiner's mark scheme requires...
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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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