Question

$N-O$ Bond

Answer 1

The rank for the bond length of the $N-O$ bond is given below.

Molecule/ion	Bond length
$N{O}^{+}$	4
$N{O}_2^{+}$	2
$N{O}_2$	1
$NO$	3

$N{O}^{+}$ ion has bond order of 3
$N{O}^{2+}$ molecule has bond order of 2.5
$N{O}_2$ molecule has bond order of 1.5
$NO$ molecule has bond order of 2.5
Higher is the bond order, lower is the bond length and vice versa.