Question

In O₂²⁻, the bond order is

A.

1.0

B.

2.0

C.

1.5

D.

2.5

Correct option is C


The molecular orbital configuration of O₂²⁻ (peroxide ion) leads to a bond order = ½ (number of bonding electrons – number of antibonding electrons) Bonding electrons = 10, Antibonding electrons = 7 Bond order = ½ (10 – 7) = 1.5

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