BCECE Medical BCECE Medical Solved Papers-2012

  • question_answer
    For the reaction, \[2{{N}_{2}}{{O}_{5}}\to 4N{{O}_{2}}+{{O}_{2}}\] rate and rate constant are \[1.02\times {{10}^{-4}}\] and\[3.4\times {{10}^{-5}}{{s}^{-1}}\] respectively, then concentration of \[{{N}_{2}}{{O}_{5}}\] at that time will be

    A)  1.732

    B)  3

    C)  \[1.02\times {{10}^{-4}}\]

    D)  \[3.4\times {{10}^{5}}\]

    Correct Answer: B

    Solution :

    \[2{{N}_{2}}{{O}_{5}}\xrightarrow{{}}4N{{O}_{2}}+{{O}_{2}}\]                 \[\frac{-d[{{N}_{2}}{{O}_{5}}]}{dt}=k[{{N}_{2}}{{O}_{5}}]\]      \[1.02\times {{10}^{-4}}=3.4\times {{10}^{-5}}{{s}^{-1}}\times [{{N}_{2}}{{O}_{5}}]\] \[\therefore \] \[[{{N}_{2}}{{O}_{5}}]=\frac{1.02\times {{10}^{-4}}}{3.4\times {{10}^{-5}}}=3\]


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