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# Which of the following species has bond order different from that in CO?

$\begin{array}{1 1}(a)\;NO^+\\(b)\; NO^-\\(c)\; CN^-\\(d)\; N_2\end{array}$

Can you answer this question?

The CO bond order is 3, where as $NO^-$ bond order is 2
Hence (b) is the correct answer.
answered Dec 6, 2013