Question

The number of antibonding electron pairs in $O_2^{-2}$ molecular ion on the basis of molecular orbital theory is -

• A. $4$
• B. $3$
• C. $2$
• D. $5$

Answer 1

The correct option is A $4$

$O_2^{-2}$ consists of four antibonding electron pairs
($1s$ and $2s$ have 2 antibonding electron pair $2p_x$ and $2p_y$ have 2 antibonding electron pair)