Question

An uncontrolled nuclear chain reaction forms the basis of:
A. hydrogen bomb
B. atom bomb
C. hydroelectric power plant
D. nuclear power plant

Answer 1

Hint: Nuclear chain reactions are divided into controlled and uncontrolled nuclear chain reactions. Controlled nuclear chain reactions take place for constructive purpose contrary to the uncontrolled nuclear chain reactions that are destructive in nature.

Complete step by step solution:
Nuclear chain reactions are divided into controlled and uncontrolled nuclear chain reactions. Controlled nuclear chain reactions take place for constructive purpose contrary to the uncontrolled nuclear chain reactions that are destructive in nature.

So, the correct answer is “Option B”.

Additional Information:
average of one or more subsequent reactions. This further leads to the possibility of a self-propagating series of these reactions.
The specific nuclear reaction may be the fission of heavy isotopes. For example uranium-235.
The nuclear chain reaction releases several million times more energy for every reaction than any other chemical reaction.

Note:
There is a difference between the controlled nuclear chain reaction and uncontrolled nuclear chain reaction. In an uncontrolled nuclear chain reaction, a large amount of energy is produced at a time (transition) whereas in controlled nuclear chain reaction, the amount of energy produced is small as well as slow (steady). If the difference is understood clearly, students can easily write the answer.