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Why are Keesom forces are said to have an orientation effect?

Keesom forces occur in polar molecules where the atoms have a considerable electronegativity difference, resulting in the charge separation and formation of positive and negative poles. The negative pole of one molecule electrostatically interacts with the positive pole of the neighboring molecule. Consequently, all the polar molecules in the medium try to orient their dipoles to be in alignment for such electrostatic interactions. This effect is called the Orientation effect . Examples are HCl and NH3,etc.

Why Keesom forces have orientation effect

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Keesom Forces

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