Question

The process by which the percentage of $U-235$ in $U-238$ is increased is called

• A. Fission
• B. Fusion
• C. Chain reaction
• D. Enrichment

Answer 1

The correct option is D

Enrichment

Explanation of correct answer:

Option (D) - Enrichment

1. $U-238$ is usually used as a nuclear fuel in many nuclear reactors.
2. But to have an effective nuclear fuel the percentage of $U-235$is increased in $U-238$. This process is called enrichment.

Explanation of incorrect answers:

1. Option (A) - Fission: The process of splitting a heavy nucleus into lighter nuclei with the release of energy is called nuclear fission.
2. Option (B) - Fusion: The process of combining two lighter nuclei into a heavier nucleus is called nuclear fusion.
3. Option (C) - Chain reaction: The nuclear process either fission or fusion if went uncontrolled continuously it is known as a chain reaction.

Hence, option D is the correct answer.