Among `KO_(2),ALO_(2)^(Θ)`,`BaO_(2)` and `NO_(2)^(+)`,unpaired electrons is present in .

Options

A. `NO_(2)^(o+)` and `BaO_(2)`
B. `KO_(2)` and `AIO_(2)^(Theta)`
C. `KO_(2)` only
D. `BaO_(2)` only

Answer

C

Explanation

`KO_(2)` contains superoxide ion `O_(2)^(Theta)` and superoxide ions have three `e^(-)` bond. Thus it has one unpaired `e^(-)`
.