Mark the correct set.
Chile saltpetre - Oxide ore
Fluorspar - Halide ore
Pitchblende - Sulphide ore
Galena - Sulphate ore
Ores are such minerals from which a metal can be extracted economically and conveniently.
Chile saltpetre is nitrate ore of Sodium:
Fluorspar is halide ore of Calcium:
Pitchblende is oxide ore of Uranium:
Galena is sulphide ore of Lead: