Question

During the formation of $O_2^{-}$ from $O_2$
(1) Electron is added to the $\pi$ antibonding orbital.
(2) Bond length increases.
(3) Bond order decreases.
Correct option among the following is:

• A. 1, 2
• B. 2, 3
• C. 1, 2, 3
• D. 1, 3

Answer 1

The correct option is C 1, 2, 3

During the formation of $O_2^{-}$ from $O_2$,
electron is added in the $\pi$ - antibonding orbital and hence, the bond length increases and the bond order decreases.