Question

Which of the following gives a positive iodoform test?

Options

• C₆H₅CH₂CH₂OH

• $$\begin{array}{c}\mathrm{CH}{\phantom{A}}_3-\mathrm{CH}-\mathrm{CH}{\phantom{A}}_2\mathrm{OH}\\ |\phantom{......}\\ \mathrm{CH}{\phantom{A}}_3\phantom{...}\end{array}$$

• PhCHOHCH₃

• CH₃CH₂CH(OH)CH₂CH₃

Answer 1

PhCHOHCH₃

Explanation:

$$\begin{array}{c}\phantom{........................}\mathrm{O}\phantom{...............................}\mathrm{O}\phantom{.}\\ \phantom{........................}||\phantom{................................}||\phantom{.}\\ \mathrm{PhCHOHCH}{\phantom{A}}_3\stackrel{\mathrm{I}{\phantom{A}}_2/\mathrm{NaOH}}{\to }\mathrm{C}{\phantom{A}}_6\mathrm{H}{\phantom{A}}_5-\mathrm{C}-\mathrm{CH}{\phantom{A}}_3\stackrel{\mathrm{I}{\phantom{A}}_2/\mathrm{NaOH}}{\to }\mathrm{CHI}{\phantom{A}}_3{\phantom{A}}_{(\mathrm{s})}+\mathrm{C}{\phantom{A}}_6\mathrm{H}{\phantom{A}}_5-\mathrm{C}-\mathrm{ONa}\end{array}$$