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JEE Main & Advanced AIEEE Solved Paper-2009

  • question_answer
    The half life period of a first order chemical reaction is 6.93 minutes. The time required for the completion of 99% of the chemical reaction will be\[(log2=0.301)\]     AIEEE  Solved  Paper-2009

    A) 230.3 minutes   

    B) 23.03 minute

    C)        46.06 minutes

    D)        460.6 minutes

    Correct Answer: C

    Solution :

                    \[K=\frac{0.693}{6.93}={{10}^{-1}}{{\min }^{-1}}\]                 \[{{10}^{-1}}=\frac{2.303}{t}\log \frac{100}{1}\]                 \[t=\frac{2.303\times 2}{{{10}^{-1}}}=46.06\,\min \]


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