Valence-bond theory is one of the two quantum mechanical approaches that explains bonding in molecules In some cases, valence bond theroy cannot cannot satisfactorily account for observed properties of molecules
Which of the following statements is correct about `O_(2),O_(2)^(Θ),O_(2)^(2-)` species ? .

Options

A. `KO_(2)` and `K_(2)O_(2)` are diamagnetic while `O_(2)` is paramagnetic .
B. `KO_(2)` and `O_(2)` are paramagnetic while `K_(2)O_(2)` is diamagnetic .
C. Bond length increase in the order `O_(2)ltO_(2)^(Θ)ltO_(2)^(2-)`
D. Bond enthalpy increases in the order `O_(2)^(2-) ltO_(2)^(Θ) ltO_(2)` .

Answer

A

Explanation

`O_(2)^(Θ)` (Superoxide ion) is paramagnetic .