Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2010

  • question_answer In Arrhenius equation for activation energy, \[k=A{{e}^{-{{E}_{a}}/Rt}},\] A represents the following [a] Pre exponential factor [b] Frequency factor      [c]  Arrhenius factor         [d] Collision factor and frequency The correct answer is

    A)  \[1\]and \[3\]        

    B)  \[1\] and \[2\]

    C)  \[3\] and \[4\]        

    D)  \[-2\] and \[3\]

    Correct Answer: B

    Solution :

    In Arrhenius equation, A is pre-exponential factor. Its units are identical to those of the units of rate constant. For first order reaction, its unit is \[{{s}^{-1}},\] hence it is often called frequency factor. Note: It is sometimes also called Arrhenius factor.

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