Which of the following molecular orbitals has a nodal plane and is relatively higher in energy compared to bonding orbitals?

$KO_2$ exhibits paramagnetic behaviour. This is due to the paramagnetic nature of

What is $LCAO$? Explain.

Among the following,the species with identical bond order are

The decreasing order of stability of $O_2, O_{2}^{-}, O_{2}^{+}$ and $O_2^{2-}$ is:

For diatomic molecules,the correct statement$(s)$ about the molecular orbitals formed by the overlap of two $2p_z$ orbitals is(are):
$(A)$ $\sigma$ orbital has a total of two nodal planes.
$(B)$ $\sigma^*$ orbital has one node in the $xz$-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 $xy$-plane containing the molecular axis.