MCQ on valence bond theory for NEET 2021
Valence Bond Theory was proposed by Heitler and London. It is based on quantum mechanics. It states that the covalent bonds are formed by the overlapping of valence shell atomic orbitals of the two atoms having unpaired electrons. The extent of overlap is a deciding factor of the covalent bond strength. More the overlap, the stronger is the bond formed. It explains the shape, hybridisation and directional properties of bonds in polyatomic molecules.