JEE Main & Advanced Chemistry Aldehydes, Ketones Question Bank Properties

  • question_answer
    Which gives difference between aldehyde and ketone [CPMT 1994]

    A)                 Fehling's solution            

    B)                 Tollen's reagent

    C)                 Schiff's reagent

    D)                 Benedict's solution

    E)                 All of these

    Correct Answer: E

    Solution :

               Fehling solution Þ Alkaline \[CuS{{O}_{4}}+Na-K\] tartarate            Tollen?s reagent Þ \[N{{H}_{4}}OH+AgN{{O}_{3}}\]                 Schiff?s reagent Þ P-rosaniline hydrochloride or magneta            Benedict?s solution Þ Alkaline \[CuS{{O}_{4}}+\]Citrate ions All these reagents are used to distinguish between aldehydes and ketones. Aldehydes reacts with all these reagents while ketones do not react.


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