Question

If $z$ axis is the molecular axis then $\pi$ orbitals are formed via the overlap of-

• A. $s+p_z$
• B. $p_x+p_y$
• C. $p_z+p_z$
• D. $p_x+p_x$

Answer 1

The correct option is D $p_x+p_x$

Atoms come through Z - axis and Px, Py both lie in the X and Y axis respectively. X and Y are orthogonal to Z so either Px-Px can form Pi bond or Py-Py can form Pi bond.
Atoms acome along $z$ axis, $p_x$ and $p_y$ both lie in the $x$ and $y$ axis respectively. $x$ and $y$ axis are orthogonal to $z$ axis so conclusion is that either $p_x$- $p_x$ or $p_y$ - $p_y$ can form $\pi$ bond along $z$ axis.