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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
    The amount of \[_{53}{{I}^{128}}\]  \[{{t}_{1/2}}=25\] minutes) left after 50 minutes will be         [AIIMS 1982; DPMT 1982, 83]

    A)                 One ? half          

    B)                 One ? third

    C)                 One ? fourth     

    D)                 Nothing

    Correct Answer: C

    Solution :

           The amount of \[_{53}{{I}^{128}}\] left after 50 minutes will be                                 = 25 minutes \[=\frac{100}{25}=\frac{1}{4}\].


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