The molecular formula of iron pyrites is ___________
Fe2O3
Fe3O4
FeCo3
FeS2
Ores are usually contaminated with earthly or undesired materials known as __________
flux
gangue
slag
minerals
_________are naturally occurring chemical substances in the earth's crust obtainable by mining.
metals
Ores
metalloids
The molecular formula of copper pyrites is ___________
Cu2S
Cu2O
CuCO3. Cu(OH)2
CuFeS2
Haematite is an ore of __________
iron
copper
zinc
aluminium
__________are minerals which are viable to be used as sources of a particular metal.
non-metals
semi-metals
Sphalerite is an ore of ___________
Zinc
Copper
Aluminium
Zincite is an important ore of __________
Silicon
Malachite is an ore of __________
Iron
The molecular formula of calamine is ____________
ZnS
ZnCO3
ZnO
ZnSO4
