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Classify the following molecules into Polar and non-polar. (H_2O, H_2, NH_3, N_2, CO_2, CO, HCI, O_2) b. Define polar and non-polar molecules. c. Whar is meant by dielectric polarization? |
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Answer» Solution :Polar molecules `H_2O, NH_3, CO, HCl` Non-polar molecules : `H_2, N_2, CO_2, and O_2` b. Refer Section 2.10.1 C. Adielectric material, polar or non-polar, when placed in an ELECTRIC field `E_0` the dipoles get aligned parallel to the field. The dielectric material set up a secondary electric field `E_p` of its own in a direction opposite to the APPLIED field `E_0`. This PHENOMENON is known as dielectric polarization. The net field strength gets reduced and is given as `E=E_0-E_P` Definition: The alignment of dipole moment of PERMANENT or induced dipoles of a dielectric in an external electric field is called dielectric polarization. |
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