The bases of chemical reactions is the covalent bond between atoms or elements. It is the sharing of electrons between two atoms. It was introduced by G.N. Lewis in the year 1916. These bonds are directional and hence they get a definite shape. There are two types of covalent bonds. Chemical bonds exists as polar covalent bonds and nonpolar covalent bonds.
The Strongest force and forms H bonds or dipole- dipole bonds. The atom’s electronegativity difference is greater than 0.4. Polar bonds have high melting point, surface tension, boiling point and low vapour pressure. Polar molecules interact with other polar substances. These molecules have positive and negative charges on the opposite ends. Therefore, they are electrically charged. Example: Sulphur, alcohol etc
The Weakest force and forms Van Der Waal interactions between nonpolar bonds. The atom’s electronegativity difference is less than 0.4. Nonpolar bonds have low melting point, surface tension, boiling point and high vapour pressure. Nonpolar molecules do not interact with other nonpolar substances. Does not have profusion of charges at opposite ends. Example: Carbon dioxide, pentane etc
To make you understand how polar and nonpolar are different from each other, here are the some major differences between polar and nonpolar:
|Difference between Polar and Nonpolar|
|Has electrical poles||Does not have electrical poles|
|One end of molecule has positive whereas the other end has negative charge||Does not have profusion of charges at opposite ends|
|H bonds occur in polar bonds||Van der waal interactions between nonpolar bonds|
|At Least one polar covalent is present in all polar molecules||Nonpolar covalent is not present in all nonpolar molecules|
|Charge separation||No charge separation|
|Dipole moment||No dipole moment|
|Example: Water||Example: Oil|
These were some important difference between nonpolar and polar. To know differences between other topics in chemistry you can register to BYJU’S or download our app for simple and interesting content. India’s largest k-12 learning app with top-notch teachers from across the nation with excellent teaching skills. Find notes, question papers for other subjects like Mathematics, Physics, Biology and various competitive exams as well. Enjoy learning with great experience. Learning is no more boring with BYJU’S.