Which of the following is diamagnetic
Oxygen molecule
Boron molecule
$N_2^ + $
None
Which is set of paramagnetic molecules or ions
Among the following, the species having the smallest bond is
During change of $O_2$ to $O_2^-$ ion, the electron adds on which one of the following orbitals
According to the molecular orbital theory, the bond order in ${C_2}$ molecule is
In which of the following pairs molecules have bond order three and are isoelectronics