February/March 2026 Paper 12

2026 · 40 questions · 40 parts · 40 marks

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32Organic Functional Group TestsHard1 mark
Which compound would give positive tests with alkaline I(aq) and with Fehling’s reagent?
four skeletal structures labelled A-D: A, a cyclohexanone ring bearing an exocyclic -CHO group; B, a cyclohexane-1,3-dione ring bearing an exocyclic =CH2 group; C, a cyclopentanone ring bearing an exocyclic -COCH3 group; D, a cyclobutane ring bearing an exocyclic -CHO group on one carbon and an exocyclic -COCH3 group on the adjacent carbon