JEE Main & Advanced Chemistry Carboxylic Acids Question Bank Properties of Carboxylic Acids and Their Derivatives

  • question_answer
    Among the following acids which has the lowest \[pKa\] value [AIEEE 2005]

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

    B)                 \[HCOOH\]

    C)                 \[{{(C{{H}_{3}})}_{2}}CH-COOH\]             

    D)                 \[C{{H}_{3}}C{{H}_{2}}COOH\]

    Correct Answer: B

    Solution :

                    \[{{K}_{a}}\propto \frac{1}{p{{K}_{a}}}\]; The value of \[{{K}_{a}}\] is highest for \[HCOOH\].


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