* Electronegativity: Chlorine is much more electronegative than hydrogen. This means chlorine attracts the shared electrons in the bond more strongly, creating a partial negative charge (δ-) on the chlorine atom and a partial positive charge (δ+) on the hydrogen atom.
* Dipole Moment: This uneven distribution of charge creates a permanent dipole moment within the HCl molecule. The molecule has a positive end (hydrogen) and a negative end (chlorine).
Therefore, due to the significant difference in electronegativity and the presence of a dipole moment, hydrogen chloride is considered a polar molecule.
