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How will you distinguish between aldehyd...

How will you distinguish between aldehydes and ketones?

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Knowledge Check

  • In aldehydes and ketones

    A
    Carbonyl carbon is nucleophilic and carbonyl oxygen is electrophilic
    B
    Carbonyl carbon, is slectrophilic and carbonyl oxygen is nucleophilic
    C
    Both are electrophilic
    D
    Both are nucleophilic

  • Aldehydes and ketones are

    A
    Chain isomers
    B
    Functional isomers
    C
    position isomers
    D
    Optical isomers

  • Aldehyde and ketones are

    A
    Homologous
    B
    Isomers
    C
    Geometrical
    D
    Conformational

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    Aldehydes and ketone are

    Aldehydes and ketones give

    Read the passage given below and answer the following questions: Aldehydes, ketones and carboxylic acids are few of the major classes of organic compounds containing carbonyl group. Aldehydes are prepared by dehydrogenation or controlled oxidation of primary alcohols and controlled or selective reduction of acyl halides. Ketones are prepared by oxidation of secondary alcohols and hydration of alkynes. Carboxylic acids are prepared by the oxidation of primary alcohols, aldehydes and alkenes by hydrolysis of nitriles and by treatment of Grignard reagents with carbon dioxide. How will you distinguish between aliphatic aldehydes and aromatic aldehydes?

    Assertion (A) : Aldehydes are converted into aldols in the presence of concentrated alkali. Reason (R) : Tollen's reagent can distinguish between aldehydes and ketones but Fehling reagent cannot.

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