A) \[O_{2}^{-}\]
B) \[NO\]
C) Both A and B
D) \[C{{N}^{-}}\]
Correct Answer: C
Solution :
\[O_{2}^{-}\,(2\times 8+1=17)\] has odd number of electrons and hence it is paramagnetic. All the remaining molecules/ions, i.e., \[C{{N}^{-}}(6+7+1=14)\] diamagnetic \[NO(7+8=15)\]has odd number of electrons and hence it is paramagnetic.
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