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Aldol condensation of acetaldehyde invol...

Aldol condensation of acetaldehyde involves the formation of which of the following intermediate ?

A

`CH_(3)-underset(O)underset(||)C-underset(OH)underset(|)CH-CH_(3)`

B

`CH_(3)underset(OH)underset(|)CH-CH_(2)-underset(O)C underset(||)-H`

C

`CH_(3)CH_(2)underset(OH)underset(|)CH-underset(O)underset(||)-H`

D

`CH_(3)CH_(2)OH+CH_(3)COOH`

Text Solution

Verified by Experts

The correct Answer is:
B
`CH_(3)-underset(H)underset(|)overset(O)overset(||)C+H.CH_(2)CHOoverset(NaOH)toCH_(3)-underset(H)underset(|)overset(OH)overset(|)C-CH_(2)-overset(O)overset(||)C-H`
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ICSE-ALDEHYDES, KETONES AND CARBOXYLIC ACIDS-EXERCISE (PART-I OBJECTIVE QUESTIONS)
  1. Treatment of propionaldehyde with dil. NaOH solution gives

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  2. Hydrogenation of benzoyl chloride in the presence of Pd on BaSO(4) giv...

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  3. Aldol condensation of acetaldehyde involves the formation of which of ...

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  4. Positive iodofonn test is given by

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  5. Clemmensen reduction of a ketone is carried out in presence of

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  6. Acetone on heating with conc. H(2)SO(4) mainly gives

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  7. Schiff reagent gives pink colour with

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  8. The reaction of benzaldehyde with alkali gives

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  9. The compound which does not give formaldehyde on heating or distillati...

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  10. A cyanohydrin of a compound X on hydrolysis gives lactic acid. The X i...

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  11. The reaction of formaldehyde with Grignard's reagent followed by hydro...

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  12. IUPAC name of CH(3)CH(2)CH(2)CH(CH(3))COCH(3) is

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  13. IUPAC name of CH(3)-underset(CH(3))underset(|)C=CH-underset(O)underset...

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  14. The compound which does not give iodoform test is

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  15. The compound which does not give iodoform on treatment with NaOH and i...

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  16. When phenol is treated with CHCl(3) and NaOH, the product formed is

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  17. In the following reaction product 'P' is R-overset(O)overset(||)C-Cl...

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  18. Bakelite is a product of reaction between

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  19. The number of bonds between carbon and oxygen atoms in major product o...

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  20. Tollen's reagent is

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