Question

Among the following , the paramagnetic compound is :

• A. $N{a}_2{O}_2$
• B. $O_3$
• C. $N_{2}O$
• D. $K{O}_2$

Answer 1

The correct option is D $K{O}_2$

$K{O}_2$ has $O_2^{-}$ ion.

$O_2^{-}$ has one unpaired electron.

The electronic configuration of the $O_2^{-}$ ion containing 17 electrons can be written as: $1s^2\ast 1s^{2}2s^2\ast 2s^{2}2p{z}^{2}2p{x}^{2}2p{y}^2\ast 2p{x}^2\ast 2p{y}^1$.

Hence, option D is correct.