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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 38

  • question_answer
    The rate of disappearance of \[S{{O}_{2}}\] in the reaction \[2S{{O}_{2}}+{{O}_{2}}\to 2S{{O}_{3}},\] is\[1.28\times {{10}^{-3}}g\,litr{{e}^{-1}}\text{ }se{{c}^{-1}}\]. Then the rate of formation of \[S{{O}_{3}}\] in g \[litr{{e}^{-1}}Se{{c}^{-1}}\] is-

    A) \[0.64\times {{10}^{3}}\]        

    B)        \[0.80\times {{10}^{3}}\]

    C) \[1.28\times {{10}^{-1}}\]      

    D)        \[1.60\times {{10}^{-3}}\]

    Correct Answer: D

    Solution :

    [d]        \[=-\frac{d[S{{O}_{2}}]}{dt}=1.28\times {{10}^{-3}}g{{L}^{-1}}{{s}^{-1}}\] \[=\frac{1.28\times {{10}^{-3}}}{64}=M{{s}^{-1}}\] \[-\frac{d[S{{O}_{2}}]}{dt}=\frac{d[S{{O}_{3}}]}{dt}\] \[=\frac{1.28\times {{10}^{-3}}}{64}M{{L}^{-1}}{{s}^{-1}}\] \[=\frac{1.28\times {{10}^{-3}}}{64}\times 80g{{L}^{-1}}{{s}^{-1}}\] \[=1.6\times {{10}^{-3}}g\,{{L}^{-1}}{{s}^{-1}}\]


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