Question

If y axis is internuclear axis which pair of orbitals cannot involve in bond formation

Answer 1

Answer: In this case, these are zero overlaps [s-px, s-pz, px-pz, py-pz, py-px ]

They can’t take part in bonding.

Explanation:

Answer 2

If y axis is inter nuclear axis then 2py and 2py pair of orbitals can not form a bond.

• The axial overlap results in sigma bond formation. And laterally overlapping results in pi bond formation.  Sigma bond contains alternating atomic orbitals s-s, s-p and p-p.
• 2py and 2py wont form a bond. This is because when x - axis is taken as the internuclear axis, 2py and 2py orbitals overlap sideway, which forms a  pi bond .