JEE Main & Advanced AIEEE Solved Paper-2005

  • question_answer
    Among the following acids which has the lowest\[p{{K}_{a}}\]value?     AIEEE  Solved  Paper-2005

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

    B) \[{{(C{{H}_{3}})}_{2}}CHCOOH\]

    C) \[HCOOH\]

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

    Correct Answer: C

    Solution :

    Out of the given acids, strongest is\[HCOOH\].(highest\[{{K}_{a}}\]value) Since.\[p{{K}_{a}}=-\text{ }\log \text{ }{{K}_{a}}\] Thus, lowest\[p{{K}_{a}}\]is of\[HCOOH.\]


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