The total number of overlapping $p$-orbitals present in cycloheptatrienyl cation is

Explain $\sigma$ and $\pi$ bonds,and mention the orbital overlapping involved in their formation.

Considering the $X$-axis as the internuclear axis,which of the following will not form a sigma $(\sigma)$ bond and why?

Which of the following orbital overlaps leads to bonding?

The nodal plane in the $\pi-$bond of ethene is located in

Assuming the bond direction is along the $z$-axis,which of the following overlaps of atomic orbitals of two atoms $(A)$ and $(B)$ will result in bonding?
$I$. $s$-orbital of $A$ and $p_x$-orbital of $B$
$II$. $s$-orbital of $A$ and $p_z$-orbital of $B$
$III$. $p_y$-orbital of $A$ and $p_z$-orbital of $B$
$IV$. $s$-orbital of both $(A)$ and $(B)$