A-LevelChemistryCarbonyl compounds9701/12 · May/June 2010 · Q221 Mark

Which reagent will give similar results with both butanone and butanal?

Aacidified aqueous potassium dichromate(VI)

Ban alkaline solution containing complexed Cu2⁺ ions (Fehling's solution)

Can aqueous solution containing [Ag(NH3)2]⁺ (Tollens' reagent)

D2,4-dinitrophenylhydrazine reagent

✓ Correct answer

D: 2,4-dinitrophenylhydrazine reagent

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Topic: Carbonyl compounds, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2010 Paper 1 Variant 2, question 22.

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