Question

State True or False.

$K{O}_2$ is paramagnetic.

• A. True
• B. False

Answer 1

The correct option is A True

The given statement is true.
$K{O}_2$ is paramagnetic.
If unpaired electrons are present in an ion/molecule, then it is paramagnetic.
If all electrons are paired, then the ion/molecule is diamagnetic.
$K{O}_2$ contains $O_2^{-}$ ion which contains 1 unpaired electron.
The MO electronic configuration of $O_2^{-}:KK\left(\sigma 2s{)}^2\right(\sigma \ast 2s{)}^2\left(\sigma 2px{)}^2\right(\pi 2py{)}^2\left(\pi 2pz{)}^2\right(\pi \ast 2py{)}^2(\pi \ast 2pz{)}^1$.