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NEET Chemistry Chemical Kinetics / रासायनिक बलगतिकी Question Bank Self Evaluation Test - Chemical Kinetics

  • question_answer
    For the reaction, \[2{{N}_{2}}{{O}_{5}}\to 4N{{O}_{2}}+{{O}_{2}}\] the rate equation can be expressed in two ways\[-\frac{d[{{N}_{2}}{{O}_{5}}]}{dt}=k[{{N}_{2}}{{O}_{5}}]\] and \[+\frac{d[N{{O}_{2}}]}{dt}=k'[{{N}_{2}}{{O}_{5}}]\] k and  k' are related as:

    A) \[k=k'\]                         

    B) \[2k=k'\]

    C) \[k=2k'\]                       

    D) \[k=4k'\]

    Correct Answer: B

    Solution :

    [b] Rate of disappearance of reactant= Rate of appearance of products \[-\frac{1}{2}\frac{d[{{N}_{2}}{{O}_{5}}]}{dt}=\frac{1}{4}\frac{d[N{{O}_{2}}]}{dt}\] \[\frac{1}{2}k[{{N}_{2}}{{O}_{5}}]=\frac{1}{4}k'[{{N}_{2}}{{O}_{5}}]\] \[\frac{k}{2}=\frac{k'}{4}\] \[\therefore \text{ }k'=2k\]


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