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JEE Main & Advanced Chemistry Chemical Kinetics / रासायनिक बलगतिकी Question Bank Rate law and Rate Constant

  • question_answer
    The rate constant of a first order reaction whose half-life is 480 seconds, is          [MP PET 1999]

    A)                 \[2.88\times {{10}^{-3}}{{\sec }^{-1}}\]

    B)                 \[1.44\times {{10}^{-3}}{{\sec }^{-1}}\]

    C)                 \[1.44\,{{\sec }^{-1}}\]  

    D)                 \[0.72\times {{10}^{-3}}{{\sec }^{-1}}\]

    Correct Answer: B

    Solution :

                    \[{{t}_{1/2}}=\frac{0.693}{k},\,\,k=\frac{0.693}{480}=1.44\times {{10}^{-3}}{{\sec }^{-1}}\].


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