[kapital]

What is the connection between Lewis structure and hybridization?

Is is true that Lewis structure tells just the location of the electrons and hybridization tells the geometry of molecule?

And how it is possible that some molecules do not  have hybridization?

[Schrödinger]

Hybridization is just a theoretical concept that we invented to explain the similarity of bonds in methane and other such simple compounds... Yes, hybridization is able to account for the geometry of compounds, but that is not why it came about. Hybridization fails in certain cases. See : Drago's rule

Lewis structure, on the other hand, is just a vague representation of the location of electrons over the atoms in a molecule, assuming that the bonds are either entirely covalent or entirely ionic