Explain with the help of suitable example polar covalent bond.

Explanation

The bond formed between atoms having different electronegativities is called polar covalent bond. Greater the difference in the electronegativities of the atoms formeing the bond, greater will be the polarity of the molecule. For example, the following bonds are polar covalent bonds :
`overset(delta+)(H)-overset(delta-)(Cl)" " overset(delta+)(H)-overset(delta-)(F)" " overset(delta+)(Br)-overset(delta-)(Cl)" " overset(delta-)(O)-overset(delta+)(H)`