Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) Among `KO_2, AlO_2 ^ -, BaO_2` and `NO_2 ^+` one unpaired electron is present in – - Sarthaks eConnect

Among `KO_2, AlO_2 ^ -, BaO_2` and `NO_2 ^+` one unpaired electron is present in :–

`O_2^+` and `BaO_2`

`KO_2 and AlO_2`

`KO_2` only

`BaBO_2` only

Solution

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`KO_2` has `K^+O_2^-`structure havng on unpaired electron.