Q. In which of the following, unpaired electrons are present? $KO_{2},\ {AlO}_{2}^{-},\ BaO_{2},\ {NO}_{2}^{+}$
A) ${NO}_{2}^{+},BaO_{2}$
B) $KO_{2},\ {AlO}_{2}^{-}$
C) Only $KO_{2}$
D) Only $BaO_{2}$
Explanation
(c)
Unpaired electrons are present in $KO_{2}$, while others have paired electrons.
${NO}_{2}^{+} \longrightarrow$22 electrons
$BaO_{2} \longrightarrow$72 electrons
${AlO}_{2}^{-} \longrightarrow$30 electrons
$KO_{2} \longrightarrow$35 electrons
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.