Question

Assertion :Forces acting between proton-proton $\left(f_{pp}\right)$, proton-neutron $\left(f_{pn}\right)$ and neutron-neutron $\left(f_{nn}\right)$ are such that $f_{pp}<f_{pn}=f_{nn}$ Reason: Electrostatic force of repulsion between two protons reduces net nuclear forces between them.

• 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

A proton is a positively charged species, whereas a neutron is neutral. Thus there exists a force of electrostatic repulsion between two protons which does not exists among proton-neutron or neutron-neutron system.
Thus the force of attraction between two protons is resultantly reduced.