In which molecule is the van der Waals force | vedclass

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(B) $Br_2$ is a non-polar molecule because there is no electronegativity difference between the two bromine atoms. Since it lacks a permanent dipole m

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$Br_2$

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(B) $Br_2$ is a non-polar molecule because there is no electronegativity difference between the two bromine atoms. Since it lacks a permanent dipole moment,the only intermolecular forces present are weak London dispersion forces,which are a type of van der Waals force. In contrast,$H_2S$,$HCl$,and $CO$ are polar molecules that exhibit dipole-dipole interactions,which are generally stronger than London dispersion forces. Therefore,in $Br_2$,van der Waals forces are the primary factor determining its physical properties.

In which molecule is the van der Waals force likely to be the most important factor in determining the melting point $(m.pt.)$ and boiling point $(b.pt.)$?

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