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A : Fast moving neutrons do not cause fi...

A : Fast moving neutrons do not cause fission of a uranium nucleus.
R: A fast moving neutron spends very little time inside the nucleus.

A

if both assertion & reason are true and the reason is correct explanation of the assertion then mark (1)

B

if both assertion & reason are true and the reason is not correct explanation of the assertion then mark (2)

C

if assertion is true statement but reason is false then mark (3)

D

if both assertion & reason are false then mark (4)

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem, we need to analyze the assertion and the reasoning provided regarding the behavior of fast-moving neutrons and their interaction with uranium nuclei. ### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states that "fast moving neutrons do not cause fission of a uranium nucleus." - This statement is based on the fact that fission reactions in uranium, particularly uranium-235, are more likely to occur with slow-moving neutrons. **Hint**: Consider the types of neutrons that interact with uranium nuclei and their energies. 2. **Understanding the Reasoning**: - The reasoning states that "a fast moving neutron spends very little time inside the nucleus." - This is true because fast-moving neutrons have high kinetic energy, which means they can pass through the nucleus quickly without being captured. **Hint**: Think about the relationship between the speed of the neutron and the time it interacts with the nucleus. 3. **Linking Assertion and Reason**: - The assertion is correct because fast-moving neutrons do not effectively cause fission in uranium nuclei. - The reasoning supports the assertion by explaining that the fast-moving neutrons do not spend enough time in the nucleus to interact and cause fission. **Hint**: Reflect on how the time of interaction affects the likelihood of a nuclear reaction. 4. **Conclusion**: - Both the assertion and the reasoning are true. - The reasoning correctly explains why the assertion is true, making them logically connected. **Hint**: Consider how assertions and reasons are evaluated in terms of their truth and explanatory power. 5. **Final Answer**: - Since both the assertion and the reasoning are true, and the reasoning provides a correct explanation for the assertion, we conclude that the correct option is that both the assertion and reasoning are true, and the reasoning is the correct explanation of the assertion. ### Summary of the Solution: - Assertion: True - Reason: True - Reason explains Assertion: Yes Thus, the final answer is that both the assertion and reasoning are true, and the reasoning is the correct explanation of the assertion.
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