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Question 600338
JEE Chemistry · Hard

Chemical Bonding: MOT stability MCQ

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MOT stabilityHardQuestion 600338

Question

Which species does NOT exist according to MOT (bond order = 0)?
  1. A
    He₂⁺
  2. B
    H₂⁻
  3. C
    He₂
    Correct
  4. D
    H₂

Correct answer

He₂

Explanation

He₂: σ1s² σ*1s². Bond order = 0. Does not exist. He₂⁺: σ1s² σ*1s¹; BO = 0.5, exists. H₂⁻: σ1s² σ*1s¹; BO = 0.5, exists. H₂: BO = 1, exists.

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