Multiple choice Which of the following matches of ‘metal: ores’ is incorrect? Cu – malachite, chalcopyrite, azurite Fe – magnetite, hematite, siderite Mg – dolomite, brucite, magnesite Zn – calamine, sphalerite, smithsonite Al – bauxite, cryolite, chalcocite Reveal answer Fill a bubble to check yourself E Correct answer Explanation Bauxite, Al2O3.2H2O and cryolite, Na3AlF6 are ores of aluminium. Chalcocite (Cu2S) is an ore of copper.