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JEE Advanced 2013Paper 2
Exam
JEE Advanced
Year
2013
Paper
Paper 2
Subject
Chemistry
Chapter
Aldehydes and Ketones

JEE Advanced 2013 · Paper 2 · Chemistry · Aldehydes and Ketones

After completion of the reactions (I and II), the organic...

After completion of the reactions (I and II), the organic compound(s) in the reaction mixtures is(are):
After completion of the reactions (I and II), the organic compound(s) in the reaction mixtures is(are):

After completion of the reactions (I and II), the organic compound(s) in the reaction mixtures is(are):

Options

  1. AReaction I: P and Reaction II: P
  2. BReaction I: U, acetone and Reaction II: Q, acetone
  3. CReaction I: T, U, acetone and Reaction II: P
  4. DReaction I: R, acetone and Reaction II: S, acetone

Correct answer

C. Reaction I: T, U, acetone and Reaction II: P

Step-by-step solution

Reaction I is the haloform reaction. It is a chemical reaction where haloforms (CH3X)( {CH}_{3}X ) are produced by the complete halogenation of acetone in the presence of a base. In basic medium, a complete haloform reaction takes place, since the rate of the reaction increases with each α−\alpha -halogenation.

After completion of the reactions (I and II), the organic compound(s) in the reaction mixtures is(are):

When acetone is reacted with bromine in acetic acid, the bromination of ketone occurs. The first step is the protonation of the carbonyl group and the formation of the enol form. The next step is the attack of enol on the bromine. The proton on the carbonyl is then lost to yield bromoacetone.

After completion of the reactions (I and II), the organic compound(s) in the reaction mixtures is(are):
After completion of the reactions (I and II), the organic compound(s) in the reaction mixtures is(are):

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