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

  • question_answer
    In the reaction,\[A+2B\xrightarrow{{}}6C+2D\], If the initial rate \[-\frac{d[A]}{dt}\] at t = 0 is \[2.6\times {{10}^{-2}}M\text{ }se{{c}^{-1}}\] what will be the value of \[\frac{d[B]}{dt}\] at\[t=0\]?

    A) \[8.5\times {{10}^{-2}}M\text{ }se{{c}^{-1}}\]

    B) \[2.5\times {{10}^{-2}}M\text{ }se{{c}^{-1}}\]

    C) \[5.2\times {{10}^{-2}}M\text{ }se{{c}^{-1}}\]

    D) \[7.5\times {{10}^{-2}}M\text{ }se{{c}^{-1}}\]

    Correct Answer: C

    Solution :

    [c] Rate of reaction \[=\frac{Rate\text{ }of\text{ }disappearance/appearance}{Stoichiometric\text{ }coefficient}\] \[=-\frac{d[A]}{dt}=\frac{1}{2}\frac{d[B]}{dt}=2.6\times {{10}^{-2}}\] \[=-\frac{1}{2}\frac{d[B]}{dt}\] \[5.2\times {{10}^{-2}}=-\frac{d[B]}{dt}\]


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