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JEE Main20265 April 2026Evening ShiftChemistryChemical Bonding and Molecular StructureActual

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

Options

  1. A(r_A + r_B), 2(r_A + r_B)
  2. B1 2 (r_A + r_B), (r_A + r_B)
  3. C(r_A + r_B), (r_A + r_B)
  4. D2(r_A + r_B), 1 2 (r_A + r_B)

Correct 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)

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