Q45 / 180 · KCET 2018 · Chemistry

Which of the following compounds undergoes haloform reaction?

  • Correct answer
    A
    \( \mathrm{CH}_{3} \mathrm{COCH}_{3} \)
  • B
    \( \mathrm{HCHO} \)
  • C
    \( \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Br} \)
  • D
    \( \mathrm{CH}_{3}-\mathrm{O}-\mathrm{CH}_{3} \)

Solution

Compounds containing $-\stackrel{0}{\mathrm{C}}-\mathrm{CH}_{3}$ or $-\mathrm{CH}-\mathrm{CH}_{3}$ group will give positive haloform test $\mathrm{CH}_{3} \mathrm{COCH}_{3}$ contains $-\stackrel{\mathrm{O}}{\mathrm{C}}-\mathrm{CH}_{3}$ group, therefore, it will give haloform reaction. The reaction involved is, $\mathrm{CH}_{3} \mathrm{COCH}_{3}+\mathrm{I}_{2}+\mathrm{NaOH} \rightarrow \mathrm{CH}_{3} \mathrm{COON} a+\underset{\text { Yellowppt }}{\mathrm{CH}_{3}}^{\downarrow}$

Hence, the correct answer is option: 'A'.

More Hydrocarbons Questions