J & K CET Engineering J and K - CET Engineering Solved Paper-2007

  • question_answer
    The units of the rate constant of a second  order reaction are

    A)  \[mo{{l}^{-1}}L{{\,}^{-1}}{{s}^{-1}}\]

    B) \[mo{{l}^{-1}}L\,{{s}^{-1}}\]

    C) \[mo{{l}^{-1}}L\,s\]

    D) \[mol\,{{L}^{-1}}{{s}^{-1}}\]

    Correct Answer: B

    Solution :

     \[\frac{dx}{dt}=k{{[A]}^{2}}\] \[k=\frac{dx}{dt{{[A]}^{2}}}\] \[=\frac{mol{{(L)}^{2}}}{L\times s\times {{(mol)}^{2}}}\] \[=mo{{l}^{-1}}\,L\,{{s}^{-1}}\]


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