May/June 2026 Paper 11

2026 · 40 questions · 40 parts · 40 marks

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34Organic Functional Group TestsHard1 mark

The structural formulas of four isomers of C

_{5}

_{10}

O are listed.

CH $_{3}$ CH(OH)CH $_{2}$ $C H = C H$ $_{2}$
(CH $_{3}$ ) $_{3}$ CCHO
CH $_{3}$ COCH $_{2}$ CH $_{2}$ CH $_{3}$
(CH $_{3}$ ) $_{2}$ CHCOCH $_{3}$

Structural isomerism only should be taken into account when answering this question. Which row is correct?

	the number of these isomers that give a precipitate with 2,4-DNPH	the number of these isomers that give a precipitate with alkaline I $_{2}$ (aq)
A	2	2
B	2	3
C	3	2
D	3	3