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12th Class Physics Nuclear Physics And Radioactivity Question Bank MCQs - Nuclei

  • question_answer
    Consider the following reaction: \[{}_{Z}^{A}\operatorname{X}\to {}_{Z+1}^{A}\operatorname{Y}\to {}_{Z-1}^{A-4}\operatorname{Z}\to {}_{Z-1}^{A-4}\operatorname{Z}\] Radioactive radiation emitted in the following sequence:                                  

    A) \[\beta ,\alpha ,\gamma \] 

    B) \[\alpha ,\beta ,\gamma \]  

    C) \[\gamma ,\beta ,\alpha \]  

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

    Correct Answer: A

    Solution :

    Option (a) is correct. Explanation: In p-emission, A remains same and Z increases by 1. In a-emission, A decreases by 4 and Z decreases by 2. In y-emission, there is no change.in A and Z.


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