Definition of Polar Covalent Bond

The covalent bond is formed by the mutual sharing of electrons between the two atoms. If these bonding atoms belong to two different non-metals that exhibit different electronegativities, then the covalent bond formed is termed a polar covalent bond.

The compounds which are formed by polar covalent bonds generally have greater interactive forces between the bonding atoms, hence they usually exist in the solid form. They have very high melting as well as boiling point. Moreover, they have the ability to conduct electricity and to get solubilized in the polar solvents.

Example of Polar Covalent Bond:

Consider a molecule of HCl, the electronegativity value of carbon is 2.5 whereas that of hydrogen is 2.1. The atom of carbon has a greater tendency to attract the shared pair of electrons towards itself as compared to a hydrogen atom. In this way, two poles are created i.e., partial positive and partial negative.