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Q.

The interactions between the molecules of acetaldehyde are dipole-dipole forces. The interaction energy between two stationary ${CH}_{3} CHO$ molecules is proportional to

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a

$r^{- 1}$

b

$r^{- 6}$

c

${r^{-}}^{3}$

d

${r^{-}}^{2}$

answer is C.

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Detailed Solution

$Interaction energy \propto \frac{1}{r^{3}} (for stationary molecules)$

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