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what do you mean by vander vall forces?

Asked by kirti bhat 25th February 2013, 4:18 PM
Answered by Expert
Answer:
A weak force of attraction between electrically neutral molecules that collide with or pass very close to each other. The van der Waals force is caused by the attraction between electron-rich regions of one molecule and electron-poor regions of another (the attraction between the molecules seen as electric dipoles). The attraction is much weaker than a chemical bond. 
Van Der Waals force is a weak attractive force between atoms or nonpolar molecules caused by an instantaneous dipole moment of one atom or molecule that induces a similar temporary dipole moment in adjacent atoms or molecules. 

Answered by Expert 25th February 2013, 6:12 PM
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