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Question

For making distinction between 2-pentanone and 3-pentanone, the reagent to be employed is:

A

$K_{2} C r_{2} O_{7} / H_{2} S O_{4}$

B

$Z n - H g / H C l$

C

$S e O_{2}$

D

$I o d i n e / N a O H$

Medium

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Solution

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Correct option is D)

Ketones having $C H_{3} C O -$ group give yellow coloured iodoform with $I_{2}$ and $N a O H$
$∴ I_{2} / N a O H$ is used to distinguish between 2-pentanone and 3-pentanone.

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