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NEET Chemistry Chemical Kinetics / रासायनिक बलगतिकी Question Bank Self Evaluation Test - Chemical Kinetics

  • question_answer
    The rate of a reaction increases four-fold when the concentration of reactant is increased 16 times. If the rate of reaction is \[4\times {{10}^{-6}}mol\text{ }{{L}^{-1}}\text{ }{{s}^{-1}}\]when the concentration of the reactant is\[4\times {{10}^{-4}}mol\text{ }{{L}^{-1}}\]. The rate constant of the reaction will be

    A) \[2\times {{10}^{-4}}mo{{l}^{1/2}}{{L}^{-1/2}}{{s}^{-1}}\]

    B) \[1\times {{10}^{-2}}{{s}^{-1}}\]

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

    D) \[25\text{ }mo{{l}^{-1}}L\text{ }mi{{n}^{-1}}\]

    Correct Answer: A

    Solution :

    [a] \[Rate\propto \sqrt{Concentration}=k\sqrt{Concentration}\] \[k=\frac{Rate}{{{(Concentration)}^{1/2}}}\] \[=\frac{4\times {{10}^{-6}}}{{{(4\times {{10}^{-4}})}^{1/2}}}=\frac{4\times {{10}^{-6}}}{2\times {{10}^{-2}}}\] \[=2\times {{10}^{-4}}mo{{l}^{1/2}}{{L}^{-1/2}}{{s}^{-1}}\]


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