Question

Explain with the help of a suitable example polar covalent bond.

Answer 1

• If two different atoms are linked to each other by a covalent bond, then the shared electron pair will not lie in the center because the bonding atoms differ in electronegativities. Such a bond is called a polar covalent bond.
  
• For example in $HCl,$ chlorine is more electronegative than hydrogen. Hence it will have more control over the shared pair of electrons & will develop a partial negative charge & hydrogen will acquire partial positive charge & a polar covalent bond is formed. Greater the difference in electronegativity of bonding atoms , more will be the polarity of the bond.