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

  • question_answer
    The half life of a first order reaction is 10 minutes. If initial amount is \[0.08\,mol/litre\] and concentration at some instant is \[0.01\,mol/litre\], then \[t=\]                [Roorkee 1990]

    A)                 10 minutes         

    B)                 30 minutes

    C)                 20 minutes         

    D)                 40 minutes

    Correct Answer: B

    Solution :

                    \[0.08\,\,mol\,\,{{l}^{-1}}\] to \[0.01\,\,mol\,\,{{l}^{-1}}\] involves 3 half-life.  So the \[t\] is 30 minutes


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