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  3. BCECE Medical

BCECE Medical BCECE Medical Solved Papers-2009

  • question_answer
    The first order rate constant for the decomposition of \[{{N}_{2}}{{O}_{5}}\] is \[6.2\times {{10}^{-4}}{{s}^{-1}}\]. The half-life in seconds is nearly

    A)  1117.7          

    B)  111.7

    C)  223             

    D)  160

    Correct Answer: A

    Solution :

    For a first order reaction, half-life period, \[{{t}_{1/2}}=\frac{0.693}{k}\]                  \[=\frac{0.693}{6.2\times {{10}^{-4}}{{s}^{-1}}}\] = 1117.7s


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