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JEE Main & Advanced AIEEE Solved Paper-2008

  • question_answer
    For a reaction \[\frac{1}{2}A\xrightarrow{{}}2B\], rate of disappearance of 'A' is related to the rate of appearance of 'B' by the expression       AIEEE  Solved  Paper-2007

    A) \[-\frac{d[A]}{dt}=\frac{d[B]}{dt}\]

    B) \[-\frac{d[A]}{dt}=4\frac{d[B]}{dt}\]      

    C) \[-\frac{d[A]}{dt}=\frac{1}{2}\frac{d[B]}{dt}\]                

    D) \[-\frac{d[A]}{dt}=\frac{1}{4}\frac{d[B]}{dt}\]                

    Correct Answer: D

    Solution :

    \[\frac{-2d[A]}{dt}=\] Rate of reaction with respect to A. \[\frac{1}{2}\frac{d[B]}{dt}=\] Rate of reaction with respect to B. \[\frac{-2d[A]}{dt}=\frac{1}{2}\frac{d[B]}{dt},-\frac{d[A]}{dt}=\frac{1}{4}\frac{d[B]}{dt}\]


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