The process by which a heavy nucleus splits into lighter nuclei is known as
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Fission
NCERT (2026-27):
Fission – “A most important neutron-induced nuclear reaction is fission. An example of fission is when a uranium isotope \( {}^{235}_{92}\mathrm{U} \) bombarded with a neutron breaks into two intermediate mass nuclear fragments
\( {}^{1}_{0}\mathrm{n}+{}^{235}_{92}\mathrm{U}\rightarrow{}^{236}_{92}\mathrm{U}\rightarrow{}^{144}_{56}\mathrm{Ba}+{}^{89}_{36}\mathrm{Kr}+3\,{}^{1}_{0}\mathrm{n} \qquad (13.10) \)”