From the following equations,pick out the possible nuclear reactions.

When two nuclei of mass $X$ and $Y$ respectively fuse to form a nucleus of mass $m$ along with the liberation of some energy, then

Define the multiplication factor $(k)$ in the context of a nuclear chain reaction.

$A$ nucleus with mass number $240$ breaks into two fragments each of mass number $120$. The binding energy per nucleon of the unfragmented nucleus is $7.6 \, MeV$,while that of the fragments is $8.5 \, MeV$. The total gain in the binding energy in the process is (in $MeV$):

Which one of the following statements about uranium is correct?

The binding energy per nucleon for a deuteron and helium are $1.1 \, MeV$ and $7 \, MeV$ respectively. If two deuteron nuclei fuse to form one helium nucleus,the energy released is $...... \, MeV$.