KO₂ is paramagnetic in nature ,It is because -
1. K⁺ ion contains unpaired electron
2. \(O_{2}^{2-}\) ion contains unpaired electron
3. \(O_{2}^{-}\) ion contains unpaired electron in \( \pi^{*}\) MO
4. \(O_{2}^{-}\) ion contains unpaired electron in \( \pi\) MO