What is the difference between polar …

Polar covalent bond means there is electronegativity difference in the atoms forming covalent bond.for example HCI, H is electropositive in nature whereas Cl is electronegative .

Non polar covalent bond means there is no electronegativity difference between the atoms forming covalent bond.for example Cl2 

Ans. Polar covalent bonding is a type of chemical bond where a pair of electrons is unequally shared between two atoms. In a polar covalent bond, the electrons are not equally shared because one atom spends more time with the electrons than the other atom. In polar covalent bonds, one atom has a stronger pull than the other atom and attracts electrons. e.g. H₂O

Nonpolar covalent bonds are a type of bond that occurs when two atoms share a pair of electrons with each other. These shared electrons glue two or more atoms together to form a molecule. e.g. Cl₂