When a covalent bond is formed between two similar atoms, the shared pair of electrons is equally attracted by the two atoms. As a result of this, the electron pair is situated exactly in between two identical nuclei. The bond is known as non-polar covalent bond. On the other hand, if the atoms forming bonds are different, the electron attracting powers of the two atoms in a bond may differ. Consequently, the shared pair will be displaced towards the atom having more electronegativity.
Which one of the following is a polar covalent compound?

Options

A. HCl
B. `H_2`
C. `O_2`
D. both (b) and (c)

Answer

A

Explanation

HCl is polar covalent compound due to difference in the electronegativity of H and Cl.