What is polar covalent bond? Explain with example.

Explanation

Let us consider the covalent bond between hydrogen and fluorine in hydrogen fluoride. The electrongativities of hydrogen and fluorine on Pauling's scale are `2.1` and 4 respectively. It mean that fluorine attracts the shared pair of electrons approximately twice as much as the hydrogen which leads to partial negative charge on fluorine and partial positive charge on hydrogen . Hence, the H-F bond is said to be polar covalent bond.