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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2009

  • question_answer
        The rate constant for the reaction,\[2{{N}_{2}}{{O}_{5}}\xrightarrow[{}]{{}}4N{{O}_{2}}+{{O}_{2}}\]\[3.0\times {{10}^{-5}}{{s}^{-1}}\]. If the rate is\[2.40\times {{10}^{-5}}\]mol \[{{L}^{-1}}{{s}^{-1}},\]Then the concentration of\[{{N}_{2}}{{O}_{5}}\](in mol \[{{L}^{-1}}\]) is

    A)  1.4                                        

    B)  1.2

    C)  0.04                                      

    D)  0.8

    Correct Answer: D

    Solution :

                    The unit of\[K({{s}^{-1}})\]indicates that the reaction is of first order \[\therefore \] \[r=K({{N}_{2}}{{O}_{5}})\] \[\therefore \] \[[{{N}_{2}}{{O}_{5}}]=\frac{2.4\times {{10}^{-5}}}{3\times {{10}^{-5}}}=0.8\]


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