Question

how to identify that in which compound hybridisation is occuring in ground state?
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Answer 1

Answer:

Hybridization was introduced to explain molecular structure when the valence bond theory failed to correctly predict them. It is experimentally observed that bond angles in organic compounds are close to 109o, 120o, or 180o. According to Valence Shell Electron Pair Repulsion (VSEPR) theory, electron pairs repel each other and the bonds and lone pairs around a central atom are generally separated by the largest possible angles.

Introduction

Carbon is a perfect example showing the need for hybrid orbitals.