A) \[2.5\]
B) \[2\]
C) \[1.5\]
D) \[1\]
Correct Answer: C
Solution :
The MO configuration of superoxide ion, {\[O_{2}^{-}(8+8+1=17)=\sigma 1{{s}^{2}},\overset{*}{\mathop{\sigma }}\,1{{s}^{2}},\sigma 2{{s}^{2}}\]\[\overset{*}{\mathop{\sigma }}\,1{{s}^{2}},\sigma 2p_{z}^{2},\pi 2p_{x}^{2}\approx \pi 2p_{y}^{2},\overset{*}{\mathop{\pi }}\,2p_{x}^{2}\approx 2p_{y}^{1}\]} \[B.O.=\frac{{{N}_{b}}-{{N}_{a}}}{2}=\frac{10-7}{2}=\frac{3}{2}=1.5\]
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