Q13.7Multiple choice
In a nuclear reactor, moderators slow down the neutrons which come out in a fission process. The moderator used have light nuclei. Heavy nuclei will not serve the purpose because Nuclei
- (a)they will break up.
- (b)elastic collision of neutrons with heavy nuclei will not slow them down.
- (c)the net weight of the reactor would be unbearably high.
- (d)substances with heavy nuclei do not occur in liquid or gaseous state at room temperature.