Question
Thu November 10, 2011 By:
 

what do we understand by polar and non polar (compunds or any other thing)

Expert Reply
Thu November 10, 2011
In chemistry, the molecular geometry and the electronegativity difference between the bonded atoms are the main factors which decide the polarity or non-polarity.

Polar molecules can be categorised as "polar covalent", "non-polar covalent", or "ionic".

 A molecule is composed of one or more chemical bonds between molecular orbitals of different atoms. A molecule may be polar either as a result of polar bonds due to differences inelectronegativity as described above, or as a result of an asymmetric arrangement of nonpolar covalent bonds and non-bonding pairs of electrons known as a full molecular orbital.

Examples: H2O, NH3, sugars, etc.

Sometimes, the molecule is non polar because the molecule has geometry in such a way that the charge of the nuclei are distributed evenly. Examples: alkanes, oils, nitrogen, etc.
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