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Punjab Medical Punjab - MET Solved Paper-2008

  • question_answer
    Observe the following reaction\[A(g)+3B(g)\xrightarrow{{}}2C(g)\] The rate of this reaction\[\left( =\frac{d[A]}{dt} \right)\]is \[3\times {{10}^{-3}}\] mol\[{{L}^{-1}}{{\min }^{-1}}\]. What is the value of\[-\frac{d[B]}{dt}\]in mol\[{{L}^{-1}}{{\min }^{-1}}\]?

    A) \[3\times {{10}^{-3}}\]                  

    B) \[9\times {{10}^{-3}}\]

    C) \[{{10}^{-3}}\]                                  

    D) \[1.5\times {{10}^{-3}}\]

    Correct Answer: B

    Solution :

    The rationalised rate =\[\frac{-d[A]}{dt}=-\frac{1}{3}\frac{d[B]}{dt}=\frac{1}{2}\frac{d[C]}{dt}\] From this relation we have\[\frac{-d[B]}{dt}=-3\times \frac{d[A]}{dt}\]


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