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NTA Abhyas NEET2020ChemistryChemical Bonding and Molecular StructurePractice

According to molecular orbital theory, which of the following will not be a viable molecule?

Options

  1. AH 2 2 -
  2. BH e 2 2 +
  3. CH e 2 +
  4. DH 2 -

Correct answer

A. H 2 2 -

Step-by-step solution

Species Bond order H 2 2 - B.O. = 1 2 [ 2 - 2 ] = 0 (does not exist) H e 2 2 + B.O. = 1 2 [ 2 - 0 ] = 1 (exist) H e 2 + B.O. = 1 2 [ 2 - 1 ] = 0.5 (exist) H 2 - B.O. = 1 2 [ 2 - 1 ] = 0.5 (exist) Species Bond order

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