Chemical Bonding and Molecular Structure - Result Question 102
####104. Which of the following is paramagnetic?
[NEET 2013]
(a) $O_2^{-}$
(b) $CN^{-}$
(c) $NO^{+}$
(d) $CO$
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Solution:
- (a) Molecular orbital configuration of $O_2^{-}$is
$O_2^{-}(17)=\sigma 1 s^{2}, \sigma^{} 1 s^{2}, \sigma 2 s^{2}, \sigma^{} 2 s^{2}$,
$\sigma 2 p_z{ }^{2}, \pi 2 p_x{ }^{2}=\pi 2 p_y{ }^{2}, \pi^{} 2 p_x{ }^{2}=\pi^{} 2 p_y{ }^{1}$
