Which of the following is magnetite ?

Which of the following is not an Ore of Iron? Haematite,Magnetite,Malachite,Siderite

Which of the following ores cannot be concentrated by electromagnetic separation? Chromite (FeCr_(2)O_(4)), magnetite (Fe_(3)O_(4)) , zinc blende (ZnS) , pyrolusite (MnO_(2)) .

Which of the following ores can be concentrated by magnetic separation. (i) Zinc blende, (i) Bauxite (iii) Haematite (iv) Magnetite

Which of the following ore is best concentrated by froth floating process? Magnetite, galena, Malachite, Cassiterite

Which of the following set represent correct formula for malachite, magnetite, Calamine & Cryolite ?

which of the following ores can be connected by forth magnetic sepuration method ? (i)Haematite (ii)magnetite(iii)siderite(iv)Fool's gold