Q. The maximum covalency of a non-metallic group 15 element 'E' with weakest E – E bond is :
A) 4
B) 6
C) 3
D) 5
Explanation
[Solution by Dr. Abubacker] Within group 15, nitrogen has the weakest E–E single bond (strong lone-pair repulsion between small atoms). Nitrogen has no d-orbitals, so its maximum covalency is 4 (as in NH₄⁺). Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.