A-LevelChemistryOrganic synthesisMay/June 2015Paper 1 Q231 Mark
Butanedioic acid may be synthesised in two steps from 1,2-dibromoethane. BrCH₂CH₂Br --step 1--> X --step 2--> HO₂CCH₂CH₂CO₂H Which reagents could be used for this synthesis? step 1 step 2
AHCN(g), HCl(aq)
BHCO₂Na(aq), HCl(aq)
CKCN(alcoholic), H₂SO₄(aq)
DNaOH(aq), K₂Cr₂O₇/H₂SO₄(aq)
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The correct answer is C. This question tests the candidate's understanding of organic synthesis 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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