Question
The covalent radii of atoms A and B are r_A and r_B, respectively. The covalent bond length and total length of AB molecule are respectively
JEE Main
Chemistry
Chemical Bonding and Molecular Structure
2026
JEE Main 2026 (05 April Shift 2)
JEE Main Chemistry Question (2026) — Solution
Options
- A. (r_A + r_B), 2(r_A + r_B)
- B. 1 2 (r_A + r_B), (r_A + r_B)
- C. (r_A + r_B), (r_A + r_B)
- D. 2(r_A + r_B), 1 2 (r_A + r_B)
Answer
A. (r_A + r_B), 2(r_A + r_B)
Step-by-step solution
The covalent bond length of the AB molecule is the internuclear distance between atom A and atom B. Bond length = r_A + r_B The total length of the AB molecule is the distance between the outermost boundaries of the two atoms along the internuclear axis. Total length = Radius of A + Bond length + Radius of B Total length = r_A + (r_A + r_B) + r_B = 2(r_A + r_B) Answer: (r_A + r_B), 2(r_A + r_B)
Related: Chemistry — Chemical Bonding and Molecular Structure · All PYQ Banks