JEE Main & Advanced Chemistry Aldehydes, Ketones Question Bank Properties

  • question_answer
    \[C{{H}_{3}}CHO\] react with aqueous NaOH solution to form [MP PMT 1992]

    A)                 3-hydroxy butanal          

    B)                 2-hydroxy butanal

    C)                 4-hydroxy butanal          

    D)                 3-hydroxy butanol

    Correct Answer: A

    Solution :

               This reaction is aldol condensation                 \[\underset{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,3-\text{hydroxy}\,\,\text{butanal}}{\mathop{2C{{H}_{3}}CHO\xrightarrow{\text{dil}\,\,\,\text{NaOH}}C{{H}_{3}}-\underset{OH}{\mathop{\underset{|\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}-CHO}}\,\]


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