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The intermediate formed in aldol condens...

The intermediate formed in aldol condensation is

A

aldol

B

carbanion

C

alcohol

D

`alpha`- hydrogen ester

Text Solution

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The correct Answer is:
B
Aldol condensation : When a carbonyl compound cantaining `alpha`-hydrogen is treated with a base, first of all carbonion is formed . For example,
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A2Z-ALDEHYDES, KETONES AND CARBOXYLIC ACID-AIIMS Questions
  1. Aldehydes and keton can be distinguished by

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  2. The above reaction is

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  3. The intermediate formed in aldol condensation is

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  4. In the reaction C(6)H(5)CHO + C(6)H(5)NH(2) rarr C(6)H(5)N rarr CHC(...

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  5. The compound most suitable for the preparation of cyanohydrin is

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  6. Among the following the strongest acid is

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  7. At higher temperature, iodoform reaction is given by the dilute soluti...

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  8. The regent used for the sepration of acetaldehyde from acetophenone is

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  9. o-Toluic acid on reaction with Br(2) + Fe gives

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  10. CH(3) CO(2) C(2) H(5) on reaction with sodium ethoxide in ethanol give...

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  11. The following sequence of reaction on Agives

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  12. Isopropylbenzne on air oxidation in the presence of dilute acid gives

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  13. The product obtained is//are

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  14. Benzoic acid is treat with lithum aluminium hydride.

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  15. CH(3)CH(2)C = N overset (X) to CH(3)CH(2)OH The compound X is

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  16. Which of these compound is synthesised by chloral?

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  17. Prologed exposure of far or oil in moist air and light causes had smel...

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  18. 3-hydroxybutanal formed when X reacts whith Y in dilute Z solution. Wh...

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  19. In the reaction Mg-Br is the treated with CH(3)CN and then hydrolys...

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  20. In the following soquency of the reaction , identify the final product

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