The strength of covalent bond ___________ extent of overlapping of orbitals. a) may be or may not be related to b) is independent on c) is dependent on d) is not related to Ans. (c) Sol. As per the concept of valence bond theory, the partial merging of atomic orbitals is knowns as overlapping. The extent of overlapping is directly proportional to the strength of the covalent bond, i.e. it is dependent.