chem: intermolecular force

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1

<p>i have a question: which one has the largest intermolecular forces CH3Cl, CH2Cl2, or CHCl3? please explain, thanks!</p>

2

<p>CHCl3, L.D. forces predominate over a very heavy molecule.</p>

3

<p>but somebody told me that CCl4 has the lowest intrmolecule force among the three i mentioned above? why? isn't CCl4 the heaviest compound here?</p>

4

<p>well, CHCl3 is polar, CCl4 is not. hence, the dipole-dipole forces of CHCl3 is greater than CCl4 london forces</p>