Question

Assertion: Nuclear forces are called short-range forces.

Reason: Nuclear forces operate over a very small distance i.e., ${10}^{-15}m$ or 1 fermi.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is A

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Explanation for the correct option

Option (A)

1. Nuclear forces are called short-range forces, and this is true.
2. The nuclear force is valid only in the subatomic range, (0 to ${10}^{-15}m$ ), particularly it is valid inside the atom.
3. The concentration of protons and neutrons in a small nucleus is due to nuclear force. It operates over a small range.
4. So, both assertion and reason is correct.

Explanation for the incorrect options

Option (B)

1. The nuclear force is valid only in the subatomic range, (0 to ${10}^{-15}m$ ), particularly it is valid inside the atom.
2. That's why Nuclear forces are called short-range force. So, option (B) is not correct.

Option (C)

1. Nuclear forces are called short-range force it is true and it is due to its validness in subatomic range.

Option (D)

1. The nuclear force is valid only in the subatomic range, (0 to ${10}^{-15}m$ ), particularly it is valid inside the atom.
2. That's why Nuclear forces are called short-range force. So, option (B) is not correct.

Therefore, option (A) is correct.