# Most likely intermolecular force in aqueous ethanol

The most likely interaction to be found in an aqueous solution of ethanol is

A. London dispersion forces
B. Hydrogen bonding
C. Dipole-dipole interactions
D. Ion-dipole interactions

I am split between B and C. I actually thought it was both of them but the question requires me to choose only one.

• I really think the question is poorly worded. The phrase "most likely" is a probability consideration. The only answer that is really eliminated is (d) since few of the water molecules will be ionized. HINT - The only way to answer the question is to think of "most likely" to mean "most significant," that is the strongest type of bonding from the remaining three. So what do you think? – MaxW Sep 14 '16 at 2:12

(D) is out as auto-ionisation of water $$\ce{2H2O -> H3O+ + OH-}$$ is negligible.