The total number of molecular orbitals formed from $2s$ and $2p$ atomic orbitals of a diatomic molecule is:

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

The calculated bond order of superoxide ion $(O_{2}^{-})$ is

In which of the following molecules would you expect the nitrogen-to-nitrogen bond length to be the shortest?

If $N_x$ is the number of bonding orbitals of an atom and $N_y$ is the number of antibonding orbitals,then the molecule/atom will be stable if

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: