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KVPY Sample Paper KVPY Stream-SX Model Paper-18

  • question_answer
    In the radioactive decay \[_{z}{{X}^{A}}\to {{\,}_{Z+1}}{{Y}^{A}}\to \underset{high\,\,energy}{\mathop{_{Z-1}{{Z}^{A-4}}}}\,\to \underset{low\,\,energy}{\mathop{_{Z-1}{{Z}^{A-4}}}}\,\] sequence of the radiation emitted is-

    A) \[\alpha ,\beta ,\gamma \]

    B) \[\gamma ,\alpha ,\beta \]

    C) \[\beta ,\gamma ,\alpha \]

    D) \[\beta ,\alpha ,\gamma \]

    Correct Answer: D

    Solution :

    \[\beta \to Z\] increases by 1 unit \[\alpha \to Z\] decreases by 2 & a by 4


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