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  4. The interaction energy of London forces between two particles is proportional to r x , where r is the distance between the particles. The value of x is :

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Q. The interaction energy of London forces between two particles is proportional to $r ^{ x }$, where $r$ is the distance between the particles. The value of $x$ is :

JEE MainJEE Main 2021States of Matter

Solution:

For london dispersion forces.
$E \propto \frac{1}{ r ^{6}}$
Hence $x=-6$