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RAJASTHAN PMT Rajasthan - PMT Solved Paper-1996

  • question_answer
    The \[_{p}{{K}_{a}}\] values for the dissociation of carbonic acid, acetic acid and formic acid are respectively  \[6.3,4.74,\] and \[3.62\]. Which of the following statement is wrong?

    A)  Acetic acid is weakest in all three

    B)                         Formic acid is strongest in all the three

    C)                         Carbonic acid is strongest in all the three

    D)                         Acetic acid is weaker than carbonic acid

    Correct Answer: B

    Solution :

    It will be strong which will have low value of \[_{p}{{K}_{a}}\]. The value of \[_{p}{{K}_{a}}\] of \[HCOOH\]is very low \[3.62\] thats why it is very strong acid.


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