According to $MO$ theory which of the lists ranks the nitrogen species in terms of increasing bond order?
$N_2^{2-} < N_2^- < N_2$
$N_2 < N_2^{2-} < N_2^-$
$N_2^- < N_2^{2-} < N_2$
$N_2^- < N_2 < N_2^{2-}$
$O_2^{2 - }$is the symbol of .. ion
Bond energies in $NO,\,N{O^ + }$ and $N{O^ - }$ are such as
Among the following species$N _{2}, N _{2}^{+}, N _{2}^{-}, N _{2}{ }^{2-}, O _{2}, O _{2}{ }^{+}, O _{2}^{-}, O _{2}{ }^{2-}$ the number of species showing diamagnetism is.
For diatomic molecules, the correct statement($s$) about the molecular orbitals formed by the overlap to two $2 p_z$ orbitals is(are)
$(A)$ $\sigma$ orbital has a total of two nodal planes.
$(B)$ $\sigma^*$ orbital has one node in the $x z$-plane containing the molecular axis.
$(C)$ $\pi$ orbital has one node in the plane which is perpendicular to the molecular axis and goes through the center of the molecule.
$(D)$ $\pi^*$ orbital has one node in the $x y$-plane containing the molecular axis.
If Hund's Rule does not hold good, then which of the following pairs is diamagnetic