1.

Nuclear fission of 235U is a chain process. Justify.

Answer»
  • Nuclear fission of 235U occurs when nucleus absorbs neutron. When a uranium nucleus absorbs neutron, it breaks into two lighter fragments and releases energy (heat), more neutrons, and other radiation.
  • When one uranium 235 nucleus undergoes fission, three neutrons are emitted.
  • These neutrons emitted in fission cause more fission of the uranium nuclei which yield more neutrons. These neutrons again bring forth fission producing further neutrons.
  • The process continues indefinitely leading to chain reaction which continues even after the removal of bombarding neutrons.


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