Why HCl has polar character though it has covalent bond?

Answer 1

Hydrogen is a very small cation and also exist a difference between the electronegativies of H and Cl.

Answer 2

HCl molecules have a polar character because there is a large electronegativity difference between hydrogen and chlorine atoms. This leads to unequal sharing of electrons in the covalent bond, with chlorine pulling the shared electrons closer to itself, creating a partial negative charge on chlorine and a partial positive charge on hydrogen. This separation of charge gives the molecule its polar nature.