Physics - Modern Physics Question with Solution | TestHub

The above is a plot of binding energy per nucleon $E_b$, against the nuclear mass $M;A,B,C,D,E,F$ correspond to different nuclei. Consider four reactions: (i) $A+B\to C+\epsilon$ (ii) $\mathrm{C}\to \mathrm{A}+\mathrm{B}+\epsilon$ (iii) $\mathrm{D}+\mathrm{E}\to \mathrm{F}+\epsilon$ and (iv) $F\to D+E+\epsilon$ where $\epsilon$ is the energy released? In which reactions is $\epsilon$ positive?