1. London dispersion forces: These are weak forces that result from temporary fluctuations in electron distribution within atoms or molecules, leading to the formation of temporary dipoles.
2. Dipole-dipole interactions: These are stronger forces that occur between molecules that have permanent dipoles, with positive and negative ends. These forces align the molecules in such a way that the positive and negative ends of different molecules attract each other.
State two types of van der waals force
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