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

The explanation for the correct option.

Option (D) enrichment:

1. Enrichment refers to the process of increasing the percentage of $U-235$ in $U-238$.
2. Enriched uranium is uranium that has had its percent composition of $U-235$ boosted by the isotope separation process.

The explanation for incorrect options

Option (A) Fission:

1. Fission: The release of energy from a nuclear event in which a heavy nucleus splits spontaneously or on collision with another particle.

Option (B) Fusion:

1. Fusion is a nuclear reaction in which low-atomic-number nuclei fuse to generate a heavier nucleus and release energy.

Option (C) Chain reaction:

1. When one nuclear reaction produces an average of one or more subsequent nuclear reactions, a nuclear chain reaction can develop, potentially leading to a self-propagating series of reactions.

Hence, option D is correct.