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. $Zn-Hg/HCl$
• C. $Se{O}_2$
• D. $I_2/NaOH$

Answer 1

Answer: (D)

$I_2/NaOH$

2-Pentanone produces Iodoform But not $3-$pentanone. This is because to undergo this test, the ketone should have a methyl group as one of the alkyl group.