Discuss `sp` hybridisation in ethyne `(C_(2)H_(2))` molecule.

Explanation

In ethane molecule, each C atom is `sp^3` hybridised. Out of the four `sp^3` hybrid orbitals of carbon atom one overlaps axially with similar orbitals of other atom to form `sp^(3)-sp^(3)` sigma bond. The other three hybrid orbitals of each carbon atom overlap with three 1s orbitals of three H atoms forming `sp^(3)-s` sigma bonds.