Long answer·Hard exam skill (4/5)·No calculator
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
An organic compound has formula . It gives 2,4-DNP test, does not reduce Tollens' reagent, gives iodoform test, and on strong oxidation gives benzoic acid. Identify and justify each clue.
Total: 4 marks
(a) Use 2,4-DNP and Tollens' tests to identify the broad class. (1 mark)
(b) Use iodoform test to narrow the structure. (1 mark)
(c) Use oxidation product to identify . (1 mark)
(d) Write the name of . (1 mark)
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