Multiple choice

Which of the following statements is not correct from the view point of the molecular orbital theory?

  1. He2 is not a stable molecule.

  2. H2 is paramagnetic while H2+ is diamagnetic.

  3. Be2 is not stable but Be2+ is expected to exist.

  4. N2 has higher bond order than O2.

  5. N2 and CO have identical bond orders.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

H2 (2 electrons) = s1s2; no unpaired electron, hence H2 is diamagnetic. H2+ (1 electron) = s1s1; one unpaired electron, hence H2+ is paramagnetic.

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