What is polarity? explai briefly with a suitable example

Asked by rajeswari2171 | 18th Sep, 2012, 10:36: PM

Expert Answer:

Polarity is a physical property of compounds. Polarity results from the uneven partial charge distribution between various atoms in a compound. Atoms, such as nitrogen, oxygen, and halogens, that are more electronegative have a tendency to have partial negative charges. Atoms, such as carbon and hydrogen, have a tendency to be more neutral or have partial positive charges.
 

The electronegativities of hydrogen, carbon, and nitrogen are 2.20, 2.55, and 3.04. The 0.35 difference in electronegativity for the H-C bond shows that it is essentially nonpolar. The 0.49 difference in electronegativity for the C-N bond tells us that it is polar. Molecules with one polar bond are always polar.


Answered by  | 18th Sep, 2012, 11:29: PM

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