Q. Which one of the following ionic species has the greatest proton affinity to form stable compound?
A) NH₂⁻
B) F⁻
C) I⁻
D) HS⁻
Explanation
[Solution from source] Proton affinity is greatest for the strongest base. NH₂⁻ is the conjugate base of NH₃, an extremely weak acid, so it is the strongest base here. F⁻, I⁻ and HS⁻ are conjugate bases of much stronger acids. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.