The chemical composition ' slag ' formed during the smelting process in the extraction of copper is :
Cu2O + FeS
FeSiO3
CuFeS2
Cu2S + FeO
Scientific and technological process used for isolation of the metal from its ores is known as ________.
Metallurgy
Metallica
Metallography
None of these
Which of the following is an Epsom salt ?
7CaSO4H2O
BaSO4 2H2O
MgSO47H2O
MgSO4. 2H2O
Sulphide ores are generally concentrated by :
Froth flotation
Roasting
Gravity
Reduction by carbon
Ore associated with rock impurities are called:
Gangue
Mineral
Flux
Bauxite is :
Na2 . AlF6
Al2O3 .2H2O
2CaCo3 . Cu(OH)2
Cu2O
In electro refining of copper some gold is deposited at
Cathode
Electrode
Cathode mud
Anode mud
_________ is an ore of Zinc.
Malachite
Siderite
Calamine
Haematite
Copper is extracted form its ore by :
Electrolytic reduction
Auto reduction
Cyanide process
Magnetic separation
The composition of malachite is
CaSO4 2H2o
Ca3(PO4)2
CuCO3. Cu (OH)2
PbSO4
