JEE Main & Advanced Sample Paper JEE Main - Mock Test - 35

  • question_answer
    The half-life period of a radio-active element X is same as the mean life time of another radio-active element Y. Initially they have the same number of atoms. Then

    A) X and Y decay at same rate always

    B) X will decay faster than Y

    C) Y will decay faster than X

    D) X and Y have same decay rate initially

    Correct Answer: C

    Solution :

    According to question, Half life of X, Now, the rate of decay is given by Y will decay faster than X.

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