MCQ
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^ - $
  • $K{O_2}$ only
  • D
    $Ba{O_2}$ only

Answer

Correct option: C.
$K{O_2}$ only
(c) Unpaired electrons are present in $K{O_2}$

while others have paired electron

$NO_2^ + $$= 22$ electrons ; $Ba{O_2}$= $72 $

electrons$Al{O_2} = 30$ electrons ; $K{O_2} = 35$ electrons

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