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Manipal Medical Manipal Medical Solved Paper-2014

  • question_answer
    The \[p{{K}_{a}}\]of phenol is 9.2. Predict which of the      following \[p{{K}_{a}}\] values given below is most      consistent for the \[p{{K}_{a}}\] of para- hydroxy benzaldehyde?

    A) 10.4                  

    B) 8.6

    C) 4:8

    D) Insufficient information

    Correct Answer: B

    Solution :

    ?CHO at para position will increase acid strength hence \[p{{k}_{a}}\] will be lowered but not as much as to reach 4.8.


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