Question

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 : 

(1) 3 

(2) –3 

(3) –6 

(4) 6

Answer 1

Answer is (3) –6

For london dispersion forces.

E ∝\(\frac{1}{r^6}\) 

Hence x = -6