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JEE Main & Advanced Sample Paper JEE Main Sample Paper-6

  • question_answer
    For the reaction \[3Br{{O}^{-}}\xrightarrow[{}]{{}}BrO_{3}^{-}+2B{{r}^{-}},\] in alkaline solution, the value of the second order (in \[Br{{O}^{-}}\]) rate constant at \[80{}^\circ C\] in the rate law for \[-\Delta [Br{{O}^{-}}]/\Delta t\] was found to be \[0.056L\,mo{{l}^{-1}}{{s}^{-1}}\].Then \[\Delta [BrO_{3}^{-}]/\Delta t\]is

    A)  \[0.019\,L\,mo{{l}^{-1}}\,{{s}^{-1}}\]     

    B)  \[0.012\,L\,mo{{l}^{-1}}\,{{s}^{-1}}\]

    C)  \[0.168\,L\,mo{{l}^{-1}}\,{{s}^{-1}}\]     

    D)  \[0.056\,L\,mo{{l}^{-1}}\,{{s}^{-1}}\]

    Correct Answer: A

    Solution :

    \[BrO_{3}^{-}\]appears at a rate one third that of disappearance of \[BrO_{{}}^{-}=\frac{0.056}{3}\] \[=0.019\,\text{L}\,\text{mo}{{\text{l}}^{\text{-1}}}{{\text{s}}^{-1}}\]


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