Solution:

The polar covalent bond is a type of covalent bond formed between two non – identical atoms . Since the two atoms differ in their capacity to attract the shared electron pair unequal sharing of electrons results . Due to the unequal sharing of electrons , fractional positive and negative charges are developed on the bonded atoms and the bond is said to be polar .

The non – polar covalent bond is a covalent bond in which the difference in electronegativity between bonded atoms is less than 0 .5 .