general has 20 questions associated with it.
I think it was originally intended to refer to general chemistry, but I don't think it's really important in that designation, either. Pretty much any chemistry concept can, on some level, fit into the general chemistry curriculum, so at worst we'd be applying it to umpteen questions if we used it in that sense.
The actual population of questions tagged general is a hodgepodge of things that may not have neatly fit into an existing tag at the time, but I think we have sufficient tag coverage at this point such that we can find a pigeonhole to put them in.
Does this tag have any purpose that I'm overlooking?