Embibe Experts Solutions for Chapter: Nuclear Physics, Exercise 1: KEAM 2020

For atoms, which of the following statement is correct ?

Which of the following statements is not a property of nuclear force ?

Which of the following elements you need to remove to form an isotone family ?

The half-life of ${{}_{43}\mathrm{Tc}}^{99}$ is $6 \mathrm{h}.$ If $12 \mathrm{mg}$ of ${{}_{43}\mathrm{Tc}}^{99}$ is injected to a patient, after $24 \mathrm{h}$ how much $Tc$ will be left in the patients body ?

The number of $\mathrm{\alpha }$ -particles emitted during the radioactive decay chain from ${}_{88}{}^{226}\mathrm{Ra}$ and ending at ${}_{82}{}^{206}\mathrm{Pb}$ is

A nucleus, initially at rest, breaks up into two nuclear fragments with their radii in the ratio $2: 1 .$ Then their velocities will be in the ratio

The ratio of the energy released by $4\mathrm{kg}$ of hydrogen at sun by fusion process to $23.5\mathrm{kg}$ of ${}^{235}\mathrm{U}$ in the nuclear reactor by fission process is (Assume energy released per fusion is $26\mathrm{MeV}$ and that per fission is $200\mathrm{MeV}$)

A $2 MeV$ neutron is emitted in a fission reactor. If it looses half of its kinetic energy in each collision with a moderator atom, how many collisions must it undergo to achieve thermal energy of $0.039 eV$ ?