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JEE Main 20265 AprilEvening Shift
Exam
JEE Main
Year
2026
Date
5 April
Shift
Evening Shift
Subject
Chemistry
Chapter
Chemical Bonding and Molecular Structure

JEE Main 2026 · 5 April · Evening Shift · Chemistry · Chemical Bonding and Molecular Structure

The covalent radii of atoms A and B are r_A and r_B , respectively....

The covalent radii of atoms A and B are rAr_A and rBr_B, respectively. The covalent bond length and total length of AB molecule are respectively

Options

  1. A(rA+rB),2(rA+rB)(r_A + r_B), 2(r_A + r_B)
  2. B12(rA+rB),(rA+rB)\dfrac{1}{2}(r_A + r_B), (r_A + r_B)
  3. C(rA+rB),(rA+rB)(r_A + r_B), (r_A + r_B)
  4. D2(rA+rB),12(rA+rB)2(r_A + r_B), \dfrac{1}{2}(r_A + r_B)

Correct answer

A. (rA+rB),2(rA+rB)(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 = rA+rBr_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 = rA+(rA+rB)+rB=2(rA+rB)r_A + (r_A + r_B) + r_B = 2(r_A + r_B)

Answer: (rA+rB),2(rA+rB)(r_A + r_B), 2(r_A + r_B)
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