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COMEDK2020ChemistryChemical Bonding and Molecular Structure

The number of antibonding electron pairs in O ₂²⁻ molecular ion on the basis of molecular orbital theory is [Atomic number of O is 18 ]

Options

  1. A2
  2. B3
  3. C4
  4. D5

Correct answer

C. 4

Step-by-step solution

Configuration of O ₂²⁻= 1 s², ^ n 1 s², 2 s², ^ n 2 s² , 2 p_ x ², 2 p_ x ² 2 p_ y ², ⁴ 2 p_ x ² _ p ² . Number of antibonding electron pairs is four.

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