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BCECE Engineering BCECE Engineering Solved Paper-2006

  • question_answer
    The decomposition of \[{{\text{N}}_{\text{2}}}{{\text{O}}_{\text{5}}}\]occurs as, \[\text{2}{{\text{N}}_{2}}{{O}_{5}}\xrightarrow{{}}4{{N}_{2}}+{{O}_{2}},\] and follows Ist order kinetics, hence:

    A)  the reaction is unimolecular

    B)  the reaction is bimolecular

    C)  \[{{t}_{1/2}}\propto {{a}^{o}}\]

    D)  none of the above

    Correct Answer: C

    Solution :

    For an nth order reaction   \[{{t}_{1/2}}\propto \frac{1}{{{a}^{n-1}}}\] \[\therefore \]For 1st order reaction, \[{{t}_{1/2}}\propto \frac{1}{{{a}^{1-1}}}\propto {{a}^{o}}.\]


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