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The following does not undergo aldol con...

The following does not undergo aldol condensation in the presence of alkali

A

`CH_(3)CHO`

B

`CH_(3)COCH_(3)`

C

`CH_(3)CH_(2)CHO`

D

`C Cl_(3)CHO`

Text Solution

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The correct Answer is:
D
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An organic compound, C_(2)H_(4)O gives a red precipitate when warmed with Fehling’s solution. It also undergoes aldol condensation in presence of alkali. (i) Write IUPAC name of the compound. (ii) What is the hybridization of carbon atoms in the compound ? (iii) Write equation for the reaction.

Discuss aldol condensation.

Knowledge Check

  • Which of the following does not undergo aldol condensation ?

    A
    `ClCH_(2)CHO`
    B
    `C Cl_(3)-CHO`
    C
    `C_(6)H_(5)CH_(2)CHO`
    D
    `CH_(3)CHO`

  • Which of the following does not undergo disproportionation in the presence of

    A
    `CH_(3)CHO`
    B
    `HCHO`
    C
    `C_(6)H_(5)CHO`
    D
    Chloral

  • Which of the following does not undergo hydrolysis ?

    A
    `BCl_3`
    B
    `"BBr"_3`
    C
    `BF_3`
    D
    `BI_3`

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    Which of the following compounds undergo aldol condensation?

    Among the following compounds, some undergo aldol condensation , some undergo Cannizzaro reaction and the remaining undergo neither aldol condensation nor Cannizzaro reaction . Differentiate them and write the structures of the products of aldol condensation and Cannizzaro reaction. i) Benzaldehyde ii) Cyclohexanone iii) Methanal iv) Benzophenone v) 2- Methylpentanal vi) Butan - 1- ol vii) 2,2 - Dimethylbutanal viii) Phenyl acetaldehyde iv) 1 - Phenylpropanone

    Which of the following compounds would undergo aldol condensation, which the Cannizzaro reaction and which neither? Write the structures of the expected products of aldol condensation and Cannizzaro reaction. {:("(i) Methanal"," (ii) 2-Methylpentanal"," (iii) Benzaldehyde"),("(iv) Benzophenone"," (v) Cyclohexanone"," (vi) 1-Phenylpropanone"),("(vii) Phenylacetaldehyde"," (viii) Butan-1-ol"," (ix) 2,2-Dimethylbutanal"):}

    Describe the Cross aldol condensation .

    Describe the Cross aldol condensation .

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