JEE Main 2015 · 4 Apr · Shift 1 · Chemistry Q34

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ChemistrySingle correct+4 / -1Question 34 of 90

The intermolecular interaction that is dependent on the inverse cube of distance between the molecules is :

ion - ion interaction

ion - dipole interaction

London force

hydrogen bond

Answer and worked solution

Official answer: D

The energy of dipole-dipole type interactions falls as $1/r^3$ between fixed dipoles. Hydrogen bonding is the strong dipole-dipole interaction among the options, so it is the one keyed.

The others fall off differently: ion-ion as $1/r$ , ion-dipole as $1/r^2$ , and London forces as $1/r^6$ .

Topics:Liquid state Hydrogen bonding

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JEE Main 2015 · 4 Apr · Shift 1, Chemistry question 34