Find the number of nodal plane in Highest Occupied Molecular Orbital ($HOMO$) of $O_2$ molecule.

Q. How many unpaired electrons are present in the highest occupied molecular orbital of $O_2$ molecule?

Q. An electron is removed from the highest occupied molecular orbital (HOMO) in each of the given molecules as indicated. Select the molecule in which the HOMO becomes the LUMO (Lowest unoccupied molecular orbital) after the Ionisation is done.

Q. The number of nodal planes in ${}^{\sigma }2P_x$ molecular orbital is

Q. In the molecular orbital diagram for $O_2^{+}$ ion, the highest occupied orbital is:

Q. Assertion: $B_2$ molecule is diamagnetic.
Reason: The highest occupied molecular orbital is of $\sigma$ type.