Embibe Experts Solutions for Chapter: Nuclear Physics, Exercise 1: Exercise - 1

${}_{92}\mathrm{U}^{235}$ nucleus absorbs a slow neutron and undergoes fission into ${}_{54}X^{139}$ and ${}_{38}\mathrm{Sr}^{94}$ nuclei. The other particles produced in this fission process are

Two lithium ${}^6\mathrm{Li}$ nuclei in a lithium vapour at room temperature do not combine to form a carbon ${}^{12}\mathrm{C}$ nucleus because 

In a uranium reactor whose thermal power is $P=100 \mathrm{MW}$, if the average number of neutrons liberated in each nuclear splitting is $2.5$. Each splitting is assumed to release energy $E=200 \mathrm{MeV}$. The number of neutrons generated per unit time is

Choose the statement which is true.

A fusion reaction is possible at high temperatures because

In a fission reaction, ${}_{92}{}^{236}\mathrm{U}\stackrel{}{\to }{}^{117}X+{}^{117}Y+n+n$ the average binding energy per nucleon of $X$ and $Y$ is $8.5 \mathrm{MeV}$ whereas that of ${}^{236}\mathrm{U}$ is $7.6 \mathrm{MeV}$. The total energy liberated will be about

A heavy nucleus having mass number $200$ gets disintegrated into two small fragments of mass number $80$ and $120$. If binding energy per nucleon for parent atom is $6.5 \mathrm{MeV}$ and for daughter nuclei is $7 \mathrm{MeV}$ and $8 \mathrm{MeV}$, respectively, then the energy released in each decay will be

Assuming that about $20 \mathrm{MeV}$ of energy is released per fusion reaction, ${}_1\mathrm{H}^2+{}_1\mathrm{H}^3\to {}_0\mathrm{n}^1+{}_2\mathrm{He}^4$, the mass of ${}_1\mathrm{H}^2$ consumed per day in a future fusion reactor of power $1 \mathrm{MW}$ would be approximately