A-LevelChemistryCarboxylic acids and derivativesMay/June 2020Paper 1 Q201 Mark
Compound X is shown. [Diagram of Compound X: a benzene ring with -COOH and -OH attached to adjacent carbons.] X is treated separately with NaOH(aq) and LiAlH4 to give Y and Z. [Reaction scheme showing X reacting with NaOH(aq) to give Y, and X reacting with LiAlH4 to give Z.] What are Y and Z?
A[Diagram showing Y: benzene ring with -CO2Na and -OH. Diagram showing Z: benzene ring with -CH2OH and -OH.]
B[Diagram showing Y: benzene ring with -CO2Na and -OH. Diagram showing Z: benzene ring with -COOH and -OH.]
C[Diagram showing Y: benzene ring with -CO2Na and -ONa. Diagram showing Z: benzene ring with -CH2OH and -OH.]
D[Diagram showing Y: benzene ring with -CO2Na and -ONa. Diagram showing Z: benzene ring with -COOH and -OH.]
✓ Correct Answer
The correct answer is A. This question tests the candidate's understanding of carboxylic acids and derivatives 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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