AIIMS AIIMS Solved Paper-2011

  • question_answer
    A reaction involving two different reactants can never be

    A)  bimolecular reaction

    B)  second order reaction

    C)  first order reaction

    D)  unimolecular reaction

    Correct Answer: D

    Solution :

    There are two different reactants (say A and B). \[A+B\xrightarrow{{}}product\] Thus, it is a bimolecular reaction. If          \[\frac{dx}{dt}=k[A][B]\] it is second-order reaction If           \[\left( \frac{dx}{dt} \right)=k[A]\] or         \[=k[B]\] it is first order reaction. Molecularity is independent of rate, but is the sum of the reacting substances thus it cannot be unimolecular reaction.


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