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Assertion : Aldol condensation can be ca...

Assertion : Aldol condensation can be catalysed can be cataysed both acid and bases.
Reason : `beta`- hydroxy aldehydes or ketones readily undergo acid catalysed dehydration.

A

If Both assertion and reason are true reason is a true explation of the assertion.

B

If Both assertion and reason are true but the reason is not the correct explation of the assertion.

C

If assertion is true but reason is false.

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
B
Both carbonions (formed in presence of base) and enol form (formed in presence of an acid) act as nucleophiles and hence add on the carbonyl group of aldhydes and ketons to give aldols.
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Knowledge Check

  • Which one the following alcohol, gives alkenes most readily on acid-catalysed dehydration?

    A
    `(CH_3)_3 COH`
    B
    `(CH_3)_2 CHCH_2 OH`
    C
    `CH_3 CHOHCH`
    D
    `CH_3 CH_2 CH_2 OH`

  • Acid catalysed aldol condensation involves

    A
    carbanion
    B
    enolate ion
    C
    enol
    D
    both (a) and (c)

  • Which one of the following reactions can be used for the preparation of beta - hydroxy acid

    A
    Perkin reaction
    B
    Reformatsky reaction
    C
    Aldol condensation
    D
    Claisen condensation

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