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NTA Abhyas JEE Main2020ChemistryChemical Bonding and Molecular StructurePractice

Using molecular orbital theory predict the correct decreasing bond order of the following species 1 . O 2 + 2 . O 2 - 3 . O 2 2 - 4 . O 2 2 +

Options

  1. A1 > 2 > 3 > 4
  2. B4 > 1 > 2 > 3
  3. C4 > 1 > 3 > 2
  4. D1 > 4 > 2 > 3

Correct answer

B. 4 > 1 > 2 > 3

Step-by-step solution

Bond order = no.of bonding e ¯ - no. of anti bonding e ¯ 2 Bond orders of O 2 + , O 2 - , O 2 2 - and O 2 2 + are respectively 2.5, 1.5, 1 and 3 Hence O 2 2 + has max bond order is O 2 2 + > O 2 + > O 2 - > O 2 2 -

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