CBSE Class 11-science Answered
What is polarity? explai briefly with a suitable example
Asked by rajeswari2171 | 18 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 | 18 Sep, 2012, 11:29: PM
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