MHT CET 2022 Chemistry question

Which among the following concepts is NOT introduced by V.B. theory?

(A)Delocalization of electron over the two nuclei
(B)Shielding effect of electrons
(C)Partial ionic character of a covalent bond
(D)Number of lone pair and bonded pair of electron decide the shape of the moleculesCorrect

Answer: (D)

Solution

Valence bond (VB) theory explains a covalent bond by overlap of half-filled atomic orbitals of two atoms (electron pair shared between the nuclei), explains shape through hybridisation and resonance, and recognises the partial ionic character of a covalent bond [(C)] and the sharing of electrons between the two nuclei

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Question ID VK-094133