BVP Medical BVP Medical Solved Paper-2009

  • question_answer
    \[2{{C}_{6}}{{H}_{5}}CHO\xrightarrow{NaOH}{{C}_{6}}{{H}_{5}}C{{H}_{2}}OH+{{C}_{6}}{{H}_{5}}COONa\]The same reaction can take place with which of the following aldehydes?

    A)  \[C{{H}_{3}}CHO\]                         

    B)  \[C{{H}_{3}}C{{H}_{2}}CHO\]

    C)  \[{{(C{{H}_{3}})}_{3}}CCHO\]  

    D)  \[{{(C{{H}_{3}})}_{2}}CHCHO\]

    Correct Answer: C

    Solution :

                    The given reaction is Cannizaro reaction. It is given by only those aldehydes in which \[\alpha -H\] atom is not present. Hence, \[{{(C{{H}_{3}})}_{3}}C.CHO\] due to the absence of \[\alpha -H\] atom gives the Cannizaro reaction as \[2{{(C{{H}_{3}})}_{3}}C.CHO\xrightarrow{Conc.\,\,NaOH}{{(C{{H}_{3}})}_{3}}C.C{{H}_{2}}OH\]\[+{{(C{{H}_{3}})}_{3}}C.COONa\] \[{{(C{{H}_{3}})}_{2}}CHCHO\]  also  gives Cannizaro reaction, between in it  \[\alpha -H\] atom is present.


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