RAJASTHAN PMT Rajasthan - PMT Solved Paper-2002

  • question_answer
    Acidic order of tri-chloroacetic acid , tri-fluro acetic acid (A), acetic acid (C) is:

    A)  \[A>B>C\]         

    B)  \[B>A>C\]         

    C)         \[C>A>B\]         

    D)         \[B=A=C\]

    Correct Answer: B

    Solution :

    Order of acidic strength is        \[\underset{(B)}{\mathop{C{{F}_{3}}COOH}}\,>\underset{(A)}{\mathop{CC{{l}_{3}}COOH}}\,>\underset{(C)}{\mathop{C{{H}_{3}}COOH}}\,\]       \[C{{F}_{3}}COOH\] is most acidic due to the greatest \[(-1)\] effect of the F-atom.


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