question_answer

Which one of the following statements about uranium is correct                                               [UPSEAT 2002]

A)            \[^{235}U\] is fissionable by thermal neutrons

B)            Fast neutrons trigger the fission process in \[n=1\text{ to }n=2\]

C)            \[^{238}U\] breaks up into fragments when bombarded by slow neutrons

D)            \[n=2\text{ to} n=1\] is an unstable isotope and undergoes spontaneous fission