Question

Difference between controlled and uncontrolled chain reactions is,

• A. The speed of a controlled chain reaction is very slow, while that of an uncontrolled chain reaction is very high.
• B. In a controlled chain reaction, energy is released slowly and almost at a constant rate. In an uncontrolled chain reaction, the energy is released almost instantaneously.
• C. We cannot obtain any useful energy from an uncontrolled chain reaction, while we can harvest the energy produced by a controlled chain reaction.
• D. All of the above

Answer 1

The correct option is D All of the above

In an uncontrolled chain reaction, the reaction occurs rapidly so that the energy is released instantaneously and therefore, we can't convert any of that into any useful form of energy.

In a controlled chain reaction, we can control the speed of reaction and thereby control the rate of release of energy. Due to this, we can convert it into any other useful form of energy.

Hence, $\left(D\right)$ is the correct answer.