Chemical Bonding And Molecular Structure Question 476
Question: Among $ KO_2,AlO_2^{-},BaO_2 $ and $ NO_2^{+} $ unpaired electron is present in
Options:
A) $ NO_2^{+} $ and $ BaO_2 $
B) $ KO_2 $ and $ AlO_2^{-} $
C) $ KO_2 $ only
D) $ BaO_2 $ only
Show Answer
Answer:
Correct Answer: C
Solution:
- In $ NO_2^{+} $ odd (unpaired) electron is removed. In peroxides $ (O_2^{2-}) $ no unpaired electrons are persent as the antibonding pi M.O.’s acquired one more electron each for pairing. $ AlO_2^{-} $ containing $ A{l^{3+}}(2s^{2}p^{6}) $ configuration and 2 oxides $ ({O^{2-}}) $ ions each of which does not contain unpaired electron. Superoxide $ O_2^{-} $ has one unpaired electron in pi antibonding M.O.
