Oil Based Exterior Paint Is It Water Based Or Oil Based Paint, Interior Or Exterior.?

Is it water based or oil based paint, interior or exterior.? - oil based exterior paint

We have 5 pots 5 gallons of color from a friend, who from a friend, and so on ............. was not sure whether the description of the color matches inside.
Can I determine if the water based varnish or oil before being placed on the walls? Also you can tell if the paint inside or outside of the only beauty. I know the towers to be used.