In the following the correct bond order sequence is: (1) O^2- 2 >O^+ 2 > O^2- 2 > O_2

Question

In the following the correct bond order sequence is: 

(1) O₂^2- > O₂⁺ > O₂^- > O₂

(2) O₂⁺ > O₂^- > O^2-₂ > O₂

(3) O₂⁺ > O₂ > O₂^- > O^2-₂

(4) O₂ > O₂^- > O₂^2- > O⁺₂

Answer 1

Answer is (3) O₂⁺ > O₂ > O₂^- > O^2-₂

O₂ (16 electrons)

Bond order of O₂ ⇒ 2

Bond order of O^-₂ ⇒ 1.5

Bond order of O^2-₂ ⇒ 1

Bond order of O⁺₂ ⇒ 2.5