Among the following the number of compounds which will give positive iodoform reaction is _____.
(a) $1$ -Phenylbutan- $2$ -one
(b) $2$ -Methylbutan- $2$ -ol
(c) $3$ -Methylbutan- $2$ -ol
(d) $1$ -Phenylethanol
(e) $3, 3$ -dimethylbutan- $2$ -one
(f) $1$ -Phenylpropan- $2$ -ol

Question

Among the following the number of compounds which will give positive iodoform reaction is _____.

(a) $1$ -Phenylbutan- $2$ -one

(b) $2$ -Methylbutan- $2$ -ol

(c) $3$ -Methylbutan- $2$ -ol

(d) $1$ -Phenylethanol

(e) $3, 3$ -dimethylbutan- $2$ -one

(f) $1$ -Phenylpropan- $2$ -ol

TestHub · Accepted Answer

Iodoform test is used to check the presence of carbonyl compounds with the structure $R - CO - {CH}_{3}$ or alcohols with the structure $R - CH (OH) - {CH}_{3}$ in a given unknown substance. The reaction of iodine, a base and a methyl ketone gives a yellow precipitate along with an “antiseptic” smell.
Hence, (c), (d), (e) and (f) give iodoform reaction

Chemistry - ORGANOMETALLIC COMPOUNDS Question with Solution | TestHub

Doubts & Discussion

JEE Advanced (2028)