Haematite is an ore of __________
iron
copper
zinc
aluminium
__________are minerals which are viable to be used as sources of a particular metal.
Ores
non-metals
metalloids
semi-metals
____________is the second most abundant metal on the earth crust.
The molecular formula of copper glance is ___________
Cu2S
Cu2O
CuCO3.Cu(OH)2
CuFeS2
Sphalerite is an ore of ___________
Zinc
Copper
Aluminium
_________are naturally occurring chemical substances in the earth's crust obtainable by mining.
metals
minerals
___________is the most abundant metal.
The molecular formula of iron pyrites is ___________
Fe2O3
Fe3O4
FeCo3
FeS2
Zincite is an important ore of __________
Silicon
The entire scientific and technological process used for the isolation of the metal from its ore is known as _______________
Concentration
metallurgy
leaching
roasting