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KVPY Sample Paper KVPY Stream-SX Model Paper-15

  • question_answer
    When phenol is treated with \[{{D}_{2}}S{{O}_{4}}/{{D}_{2}}O,\]some of the hydrogens get exchanged. The final product in this exchange reaction is

    A)

    B)

    C)      

    D)

    Correct Answer: B

    Solution :

    In acidic medium, phenol exists in the following resonating structures. Since, o/p-positions are electron rich sites, so electrophile will attack on these sites, i.e. hydrogen of these sites get exchanged by D (deuterium). Hence, the final product of the reaction is which is formed as:


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