London dispersion forces get stronger with increasing molecular size for similar substances.

Question

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London dispersion forces (also known as Van der Waals forces) are a type of intermolecular force that arise due to temporary shifts in electron density within molecules. These forces depend on the polarizability (ability to distort electron distribution) of the molecules involved. Larger molecules have more electrons and thus are more polarizable, leading to stronger London dispersion forces. Therefore, these forces get stronger with increasing molecular size for similar substances.

London Dispersion Forces Get Stronger with Increasing Molecular Size for Similar