Which of the following is paramagnetic ?

Give features of Molecular orbital $( \mathrm{MO} )$ theory:

If the magnetic moment of a dioxygen species is $1.73 \;B.M$, it may be

The correct order in which the $O -O$ bond length increases in the following is

The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals

$A$. have the same energy

$B$. have the minimum overlap

$C$. have same symmetry about the molecular axis

$D$. have different symmetry about the molecular axis

Choose the most appropriate from the options given below:

The bond order in $NO$ is $2.5$ while that in $N{O^ + }$ is $3.$ Which of the following statements is true for these two species