Question

In the nuclear fission of ${\text{U}}^{235}$.

• A. Slow neutron is absorbed by ${\text{U}}^{235}$.
• B. The products in the process are not same always, their atomic number varies from $24\text{to}58$.
• C. About $200\text{MeV}$ energy is released per fission.
• D. All of these

Answer 1

The correct option is D All of these

Few examples of nuclear fission reaction of ${}_{92}{\text{U}}^{235}$ are as follows.

${}_0{\text{n}}^1+{}_{92}{\text{U}}^{235}\to {}_{92}{\text{U}}^{236}\to {}_{56}{\text{Ba}}^{144}+{}_{36}{\text{Kr}}^{89}+3_0{\text{n}}^1$

${}_0{\text{n}}^1+{}_{92}{\text{U}}^{235}\to {}_{92}{\text{U}}^{236}\to {}_{51}{\text{Sb}}^{133}+{}_{41}{\text{Nb}}^{99}+4_0{\text{n}}^1$

${}_0{\text{n}}^1+{}_{92}{\text{U}}^{235}\to {}_{54}{\text{Xe}}^{140}+{}_{38}{\text{Sr}}^{94}+2_0{\text{n}}^1$

The nuclear fission of ${}_{92}{\text{U}}^{235}$ is initiated by the absorption of slow neutron.

The products are not always $\text{Ba}$ and $\text{Kr}$. It varies between the atomic number $34\text{to}58$.

The average energy released per fission reaction is about $200\text{MeV}$.

Hence, option $\left(D\right)$ is the correct answer.

Why this question? To test the knowledge of a student about nuclear fission process of ${\text{U}}^{235}$ and how the nucleus of ${\text{U}}^{235}$ splits into daughter nuclei along with emission of energy.