Chemical properties of hydrogen compounds can have vast differences depending on the state of matter that the substance is in - solid, liquid or gas. The difference in chemical properties is related to the dissociation of H+ from the hydrogen compound into solution. the dissociation of OH- from the hydrogen compound into solution. the energy threshold required to break the covalent bonds in the solid. the slight cohesion of the liquid solvent forming the aqueous solution. I think the answer is D - it has nothing to do with hydrogen bonding...but im not sure at all. HELP! PLEASE!