NEET Sample Paper NEET Sample Test Paper-32

  • question_answer For a third order reactions: \[3X\xrightarrow{{}}Y+Z\]the initial rate is \[5\times {{10}^{-~2}}mol\,{{L}^{-1}}\,{{S}^{-1}}\] when the cone. of X is\[0.1\text{ }mol\text{ }{{L}^{-1}}\]. The value of rate constant for the reaction is :-

    A)  \[5\times {{10}^{-2}}\text{ }{{L}^{2}}\text{ }mo{{l}^{-2}}{{s}^{-1}}\]

    B)  \[5\times {{10}^{-3}}\text{ }{{L}^{2}}\text{ }{{s}^{-1}}\]

    C)  \[5\times {{10}^{-4}}{{L}^{2}}\,mo{{l}^{-2}}{{s}^{-1}}\]

    D)  \[50\,{{L}^{2}}\,mo{{l}^{-2}}{{s}^{-1}}\]

    Correct Answer: D

    Solution :

    Rate\[=K{{[A]}^{3}}\Rightarrow k=\frac{5\times {{10}^{-2}}}{{{(0.1)}^{3}}}=50{{L}^{2}}mo{{l}^{-2}}{{s}^{-1}}\]

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