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JEE Main & Advanced Chemistry Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन Question Bank Rate of decay and Half-life

  • question_answer
    A certain nuclide has a half-life of 25 minutes. If one starts with 100 g of it, how much of it will remain at the end of 100 minutes                                               [DPMT 1982]

    A)                 1.0 g     

    B)                 4.0 g

    C)                 6.25 g   

    D)                 12.50 g

    Correct Answer: C

    Solution :

    \[n=\frac{100}{25}=4,\,N=\frac{{{N}_{o}}}{{{2}^{n}}}=\frac{100}{{{2}^{4}}}=\frac{100}{16}=6.25gm\].


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