GENERAL KNOWLEDGE

Detailed explanation-1: -Fission occurs when a neutron slams into a larger atom, forcing it to excite and split into two smaller atoms-also known as fission products. Additional neutrons are also released that can initiate a chain reaction. When each atom splits, a tremendous amount of energy is released.

Detailed explanation-2: -Nuclear chain reactions are series of nuclear fissions (splitting of atomic nuclei), each initiated by a neutron produced in a preceding fission. For eg-2.5 neutrons on the average are released by the fission of each Uranium-235 nucleus that absorbs a low energy neutron.

Detailed explanation-3: -Since neutron has no charge, it is not repelled by the positively charged nucleus . Therefore, even a very weak neutron can bombard a nucleus . Therefore, even a very weak neutron can bombard a nucleus and initiate a nuclear reaction. Hence neutron is used for bombarding the nucleus in a nuclear reaction.