Paramagnetism is exhibited by molecules
Not attracted into a magnetic field
Containing only paired electrons
Carrying a positive charge
Containing unpaired electrons
${{\rm{H}}{{\rm{e}}_2}}$ molecule is not possible.
Although $CN^-$ ion and $N_2$ molecule are isoelectronic, yet $N_2$ molecule is chemically inert because of
The molecular orbital configuration of a diatomic molecule is
$\sigma \,\,1{s^2}\,\,{\sigma ^*}\,\,1{s^2}\,\sigma \,\,2{s^2}\,{\sigma ^*}\,2{s^2}\,\,\sigma \,2p_x^2\,\left\{ {{}_{\pi \,2p_z^2}^{\pi \,2p_y^2}} \right.$
Its bond order is
Assertion : $B_2$ molecule is diamagnetic.
Reason : The highest occupied molecular orbital is of $\sigma $ type.
Which of the following has the minimum bond length ?