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Question:

Among the following molecules/ions, C₂²⁻, N₂²⁻, O₂²⁻, O₂, which one is diamagnetic and has the shortest bond length?

N₂²⁻

C₂²⁻

O₂²⁻

O₂

Solution:

Correct option is A. C₂²⁻
Solution:- (A) C₂²⁻

Chemical Species Bond Order Magnetic Behaviour
C₂²⁻ 3 diamagnetic
N₂²⁻ 2 paramagnetic
O₂ 2 paramagnetic
O₂²⁻ 1 diamagnetic
B.O. ∝ 1/bond length