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Aldehydes that do not undergo aldol cond...

Aldehydes that do not undergo aldol condensation are
(1) propanal (2) trichloroethanal (3) 2- phenylethanal (4) ethanal (5) benzaldehyde

A

3 and 4 only

B

2 and 5 only

C

1, 2 and 3 only

D

2, 3 and 5 only

Text Solution

Verified by Experts

The correct Answer is:
B
The carbonyl compound must contain an `alpha`-hydrogen atom, for it to undergo aldol condensation.
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NCERT FINGERTIPS-ALDEHYDES, KETONES AND CARBOXYLIC ACIDS-Chemical Reactions
  1. Identify (X), (Y) and (Z) in the given reaction. X +Y overset(Z) to ...

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  2. Propanal on treatment with dilute sodium hydroxide gives

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  3. Aldehydes that do not undergo aldol condensation are (1) propanal (...

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  4. The order of reactivity of CH(3)CHO, CH(3)COC(2)H(5) and CH(3)COCH(3) ...

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  5. The final product (Y) in the following sequence of chemical reaction i...

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  6. Which of the following is a correct statement ?

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  7. Which of the following is the most reactive isomer ?

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  8. When propanal reacts with 2- methylpropanal in presence of NaOH, four ...

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  9. Fill in the reagents for the given conversion : CH(3)COCl overset((...

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  10. Which compound is obtained when acetaldehyde is treated with dilute s...

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  11. Which of the following compounds will undergo self aldol condensation ...

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  12. Which of the following compounds will undergo Cannizzaro reaction ?

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  13. Which of the following does not undergo Cannizzaro reaction?

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  14. Fill in the blanks by suitable choices. The carbon atom in carbonyl ...

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  15. Match the column I with column II and mark the appropriate choice .

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  16. Which of the following aldehydes will show Cannizzaro reaction ?

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  17. overset(" CHO")underset(" CHO")("|")overset(NaOH)toX The product...

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  18. An organic compound (X) with molecular formula C(9)H(10)O gives positi...

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  19. Match the column I with column II and mark the appropriate choice .

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  20. What are correct steps to convert acetaldehyde to acetone?

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