Which of the following species is paramagnetic? (a) \( \mathrm{O}_{2}^{2-} \) (b) \( \mathrm{NO}...

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Which of the following species is paramagnetic?
(a) \( \mathrm{O}_{2}^{2-} \)
(b) \( \mathrm{NO} \)
(c) \( \mathrm{CO} \)
(d) \( \mathrm{CN}^{-} \)
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