I have three brief questions:
-why is nitromethane listed as a polar protic solvent on the Wikipedia article "Protic solvent"? I.e. why is it protic?
-with regard to organic synthesis, in particular the reactions proceeding via electrophilic substitution, what is the benefit of using solvents with high dielectric constant? I've been reading a couple of papers where it was stated that "acetonitrile was a solvent of choice... ...due to high dielectric constant". In general, when do we use high dielectric constant solvents in organic synthesis (apart from microwave synthesis)?
-why exactly is sulfuric acid a strong acid? I very well understand the common answer "because it is highly dissociated in water etc...", but I'm curious what intrinsically makes it (or any other strong oxoacid as nitric, perchloric etc.) a strong proton donor?