MolSynapsequestion bank

MolSynapse / Question bank / Aldehydes, Ketones and Carboxylic Acids / Haloform reaction

JEE Main levelOne or more correct optionsDifficulty 2 of 3co129

Which of the following give iodoform when warmed with $I X_{2}$ and aqueous $NaOH$ ?

Aheptan-2-one
B1-phenylpropan-2-one, $C X_{6} H X_{5} CH X_{2} COCH X_{3}$
Cpentan-3-one
D1-phenylpropan-1-one, $C X_{6} H X_{5} COCH X_{2} CH X_{3}$

Answer: A, B

Heptan-2-one and

C X_{6} H X_{5} CH X_{2} COCH X_{3}

both contain the

CH X_{3} CO X^{-}

group. Pentan-3-one and propiophenone have

CH X_{3} CH X_{2} CO X^{-}

groups, whose alpha carbons are only

CH X_{2}

, so no triiodo ketone with a leaving

CI X_{3}

can form.

Practice Aldehydes, Ketones and Carboxylic Acids More on Haloform reaction

Previous questionNext question

More questions on Haloform reaction