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The compound that gives a positive iodoform test is

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1-pentanol

pentanal

3-pentanone

2-pentanone

answer is B.

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Detailed Solution

2-Pentanone contains ${CH}_{3} CO -$ group. It will show iodoform test.

2-Pentanone can be written as: ${CH}_{3} {CH}_{2} {CH}_{2} (C = O) {HCH}_{3}$ , which has one methyl ketone group.

So, it can give a positive iodoform test.

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