JEE Main & Advanced Chemistry Aldehydes, Ketones Question Bank Properties

  • question_answer
    Acetaldehyde on treatment with dil. NaOH followed by heating gives                                    [CET Pune 1998]

    A)                 \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}OH\]               

    B)                 \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}CHO\]

    C)                 \[C{{H}_{3}}-CH=CHCHO\]          

    D)                 \[C{{H}_{3}}-CH=CHC{{H}_{2}}OH\]

    Correct Answer: C

    Solution :

               \[C{{H}_{3}}CHO\xrightarrow{dil\,\,NaOH}\underset{\text{Aldol}}{\mathop{C{{H}_{3}}-\underset{OH}{\mathop{\underset{|\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}-CHO}}\,\]\[\xrightarrow{Heat}\underset{{}}{\mathop{C{{H}_{3}}-CH=CH-CHO+{{H}_{2}}O}}\,\]


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