1.

Among \[K{{O}_{2}},AlO_{2}^{-},Ba{{O}_{2}}\] and \[NO_{2}^{+}\] unpaired electron is present in

A. \[NO_{2}^{+}\] and \[Ba{{O}_{2}}\]
B. \[K{{O}_{2}}\]and \[AlO_{2}^{-}\]
C. \[K{{O}_{2}}\] only
D. \[Ba{{O}_{2}}\] only
Answer» D. \[Ba{{O}_{2}}\] only


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