Q. The sequence that correctly describes the relative bond strength pertaining to oxygen molecule and its cation or anion is
A) $O_{2}^{2 -} > O_{2}^{-} > O_{2} > O_{2}^{+}$
B) $O_{2} > O_{2}^{+} > O_{2}^{-} > O_{2}^{2 -}$
C) $O_{2}^{+} > O_{2} > O_{2}^{2 -} > O_{2}^{-}$
D) $O_{2}^{+} > O_{2} > O_{2}^{-} > O_{2}^{2 -}$
Explanation
(d)
Bond order of oxygen molecule = 2
Bond order of oxygen molecule ion = 2.5
Bond order of superoxide ion ($O_{2}^{-})$ = 1.5
Bond order of peroxide ion ($O_{2}^{2 -})$ = 1
Hence, the order of bond strength is as
$O_{2}^{+} > O_{2} > O_{2}^{-} > O_{2}^{2 -}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.