Doubt from Chemical Bonding

The intermolecular interaction that is dependent on the inverse cube of distance between the molecules is :
a) hydrogen bond
b) ion-ion interaction
c) ion-dipole interaction
d) london force
It’s a previous year question.In ncert it’s written Hydrogen bond but in google every website has given answer as ion-dipole interaction.

in ncert it is mentioned for both hydrogen bond and ion dipole ( read it nicely man ) using force equation of these interactions you will realize answer is ion dipole

not in syllabus i learnt from arihant they solved it so

I think you should read it.In ncert,ion dipole is not even given.
It’s given for dipole-dipole in ncert and hydrogen bonding is a type of dipole dipole.

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Bro, ion-dipole is proportional to 1 \over r^2.

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Best.

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@Binod bro what you think the answer should be? a) or c)

ncert part i think i got wrong though sorry it is not clear about ion dipole forgot that

i hope you forgive my transgression

and in arihant they have mentioned it as r^-3 for ion dipole

A only.

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In my notes I have written that for statoinary polar molecules, dipole dipole forces will be proportional to \frac{1}{r^3} . Same with hydrogen bond. But for rotating polar molecules dipole dipole forces is proportional to \frac{1}{r^6}.

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thanks.So I would go with a) only…

6? @Siddharth_Khandelwal
This is urotroprine structure.

Is it given in ncert?

Nope

our coaching sir taught this