Manipal Engineering Manipal Engineering Solved Paper-2010

  • question_answer
    Which one of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid?

    A) Phenol                                 

    B) Benzaldehyde

    C) Butanal         

    D)        Benzoic acid

    Correct Answer: B

    Solution :

    \[A+NaOH\xrightarrow{{}}alcohol+acid\] Thus, it is Cannizaro reaction. A is thus aldehyde without\[H\]at\[\alpha -\]carbon. \[(like\,\,{{C}_{6}}{{H}_{5}}CHO,\,\,HCHO)\] \[\underset{benzaldehyde}{\mathop{2{{C}_{6}}{{H}_{5}}CHO}}\,+NaOH\xrightarrow{{}}{{C}_{6}}{{H}_{5}}C{{H}_{2}}OH\]\[+{{C}_{6}}{{H}_{5}}COONa\]


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