RAJASTHAN PMT Rajasthan - PMT Solved Paper-2003

  • question_answer
    Which one of the following have least \[_{p}{{K}_{a}}\] value?

    A)  \[CC{{l}_{3}}COOH\]

    B)  \[C{{H}_{2}}ClCOOH\]

    C)  \[C{{F}_{3}}COOH\]

    D)  \[C{{H}_{3}}COOH\]

    Correct Answer: C

    Solution :

    \[C{{F}_{3}}COOH\] is the strongest acid due to greatest -I effect of F atom among \[Cl\] and \[C{{H}_{3}}\].


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