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NEET Sample Paper NEET Sample Test Paper-53

  • question_answer
    The reaction \[2NO\,\,+\,\,B{{r}_{2}}\,\,\to \,\,2NOBr\] follows the mechanism given below
    I. \[NO+B{{r}_{2}}\rightleftharpoons NOB{{r}_{2}}\]
    .......Fast
    II. \[NOB{{r}_{2}}\,\,+\,\,NO\,\,\to \,\,2NOBr\]
    ......Slow
    If concentration of both NO and \[B{{r}_{2}}\] are increased two times, the rate of reaction would become

    A) 4 times             

    B) 2 times

    C) 8 times             

    D) 6 times

    Correct Answer: C

    Solution :

    \[r=k\left[ NO \right]\left[ NOB{{r}_{2}} \right]\] \[k'=\frac{\left[ NOB{{r}_{2}} \right]}{\left[ NO \right]\left[ B{{r}_{2}} \right]}\] \[{{r}_{2}}=k''{{\left[ NO \right]}^{2}}\left[ B{{r}_{2}} \right]\] \[{{r}_{2}}\,\,=\,\,8{{r}_{1}}\]


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