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JEE Main & Advanced Physics Nuclear Physics And Radioactivity Question Bank Graphical Questions

  • question_answer
    Binding energy per nucleon verses mass number curve for nuclei is shown in the figure. W, X, Y and Z are four nuclei indicated on the curve. The process that would release energy is                                              [IIT-JEE 1999]   

    A)            \[Y\to 2Z\]                            

    B)            \[W\to X+Z\]

    C)            \[W\to 2Y\]                          

    D)            \[X\to Y+Z\]

    Correct Answer: C

    Solution :

                       Energy is released in a process when total Binding energy (B.E.) of the nucleus is increased or we can say when total B.E. of products is more than the reactants. By calculation we can see that only in case of option (c), this happens. Given \[W\to 2Y\] B.E. of reactants = 120 ´ 75 = 900 MeV and B.E. of products = \[2\times (60\times 85)=1020\,MeV\] i.e. B.E. of products > B.E. of reactants.


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