What is hybridisation of O in H ₂ O ?

Step-by-step solution

In gaseous state, water exists as discrete H ₂ O molecule, in which the central O atom contains four sp ^3 -hybridised orbitals. Two of which are half - filled and used in over lapping with 1s orbital of H -atom to given two sp ^3- s , O - H , -bond while the remaining two exist as lone pair. The geometry of the molecule is angular or V -shape.