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

  • question_answer
    For a first order reaction \[A\to \]product, the rate of reaction at \[[A]=0.2\,\,mol\,\,{{l}^{-1}}\] is \[1.0\times {{10}^{-2}}mol\,\,{{l}^{-1}}\,{{\min }^{-1}}\]. The half life period for the reaction is           [Roorkee 1999]

    A)                 832 s     

    B)                 440 s

    C)                 416 s     

    D)                 13.86 s

    Correct Answer: D

    Solution :

               \[r=K\][reactant]                    \[\therefore \,\,K=\frac{1.0\times {{10}^{-2}}}{0.2}=0.05\]                                 \[{{t}_{1/2}}=\frac{0.693}{0.05}=13.86\,s\]


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