By which law is the energy produced in a nuclear reaction given?

India conducted an underground nuclear test at

In a nuclear fission chain reaction,a uranium atom undergoes fission to form two different products. The total mass of these products is:

The nucleus of a radioactive element possesses:

The isotopic mass of ${}_{3}^{7}Li$ is $7.016005 \ u$ and those of the $H$ atom and neutron are respectively $1.007825 \ u$ and $1.008665 \ u$. Then,the binding energy of the ${}_{3}^{7}Li$ nucleus is: (in $MeV$)

The end product of the $(4n + 2)$ radioactive disintegration series is: