Answer :
HCN : In HCN molecule C−atom is sp−hybridised orbital. One of the sp hybrid orbital overlap with the 1s orbital of H−atom, while the other mixes with one of the 3 atomic p−orbitals of N−atom.
H−C≡N: It is a linear molecule.
What is Hybridization?
The concept of hybridization is described because the procedure of combining two atomic orbitals to create a new form of hybridized orbitals. This intermixing generally effects in the formation of hybrid orbitals with absolutely special energies, shapes, and so forth. Hybridization is primarily achieved by using atomic orbitals of the identical electricity stage. However, both completely crammed and 1/2-crammed orbitals can participate on this procedure if their energies are identical. The idea of hybridization is an extension of valence bond concept that helps us recognize bond formation, bond energies, and bond lengths.
In SiCl4 = hybridization of Si is sp3 (because it contains 4 bond pairs and tetrahedral shape)
In SO3 = hybridization is sp2 (because it contains 3 bond pairs and trigonal planar shape)
In TeCl2 = hybridization is sp3 ( because it contains 2 bond pairs and 2 lone pairs and angular shape)
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