You wouldn't see anything in (2)
I'm blue/green colour blind, so (4) is hard for me. I think it's a blue/green solid, though.
In (5) the blue-ish copper nitrate will decolourise and copper (which is red/brown/pink/copper coloured/black?) would appear on the surface of the iron.
State symbols look fine to me - the ones on the reactant side we can't know if they're aq, but at least they're all soluble.