Question

Which of the following gives a positive iodoform test?

Options

• C₆H₅CH₂CH₂OH

• \[\begin{array}{cc}
  \ce{CH3-CH-CH2OH}\\
  |\phantom{......}\\
  \ce{CH3}\phantom{...}
  \end{array}\]

• PhCHOHCH₃

• CH₃CH₂CH(OH)CH₂CH₃

Answer 1

PhCHOHCH₃

Explanation:

\[\begin{array}{cc}
\phantom{........................}\ce{O}\phantom{...............................}\ce{O}\phantom{.}\\
\phantom{........................}||\phantom{................................}||\phantom{.}\\
\ce{PhCHOHCH3 ->[I2/NaOH] C6H5-C-CH3 ->[I2/NaOH] CHI3_{(s)} + C6H5-C-ONa}
\end{array}\]