Oxygen molecule is paramagnetic in nature. What is the paramagnetic content in terms of magnetic moment (B.M.) in $O_2^{-}?$ 

$O_2^{-}:\left(\sigma 1s^2\right)\left({\sigma }^{*}1s^2\right)\left(\sigma 2s^2\right)\left({\sigma }^{*}2s^2\right)\left(\sigma 2p_z^2\right)$
$(\pi 2p_x^2=\pi 2p_y^2)({\pi }^{*}2p_x^2={\pi }^{*}2p_y^1)$
$O_2^{-}$ has 1 unpaired electron.
$\mu =\sqrt{n(n+2)}B.M=\sqrt{1(1+2)}=\sqrt{3}=1.732B.M$