The difference in energy between the molecular orbital formed and the combining atomic orbitals is called

Of the species,$NO$,$NO^{+}$,$NO^{2+}$,$NO^{-}$,the one with minimum bond strength is:

$AX$ is a covalent diatomic molecule where $A$ and $X$ are second row elements of the periodic table. Based on Molecular Orbital Theory,the bond order of $AX$ is $2.5$. The total number of electrons in $AX$ is ........... (Round off to the nearest integer).

Which of the following diatomic molecular species has only $\pi$ bonds according to Molecular Orbital Theory?

Which of the following species is not paramagnetic?

Among the following molecules / ions $C_2^{2-}, N_2^{2-}, O_2^{2-}, O_2$,which one is diamagnetic and has the shortest bond length?