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BCECE Engineering BCECE Engineering Solved Paper-2004

  • question_answer
    The rate constant of a first order reaction is\[3\times {{10}^{-6}}\] per second and initial concentration is 0.10 M. Then the initial rate of reaction is:

    A) \[3\times {{10}^{-6}}m{{s}^{-1}}\]           

    B)        \[3\times {{10}^{-8}}m{{s}^{-1}}\]

    C) \[3\times {{10}^{-7}}m{{s}^{-1}}\]

    D)        \[3\times {{10}^{-9}}m{{s}^{-1}}\]

    Correct Answer: C

    Solution :

    Key Idea: For first order reaction \[rate=k\] [concentration] \[k=3\times {{10}^{-6}}\]per second concentration \[=0.1\text{ }M\] \[rate=3\times {{10}^{-6}}\times 0.1\] \[=3\times {{10}^{-7}}\,m{{s}^{-1}}\]


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