The impurities are more soluble in the melt than in the solid state of the metal .This principle is base on
Electrolytic refining
Liquation
Zone refining
Distillation
The separation based on the difference in gravities of the ore and the gangue particle is called
Fractional distillation
Gravity separation
Froth floatation
Magnetic separation.
The naturally occuring chemical substances in the earth's crust obtainable by mining are called _______ .
Ores
Gangue
Flux
Minerals
The graphical representation of Gibb's energy was first used by
Ellingham
Helmholtz
Kirchoff
Gibb's
The blistered appearance of blister copper is due to the presence of
SO2
CO2
FeSiO3
SiO2
Melting pig iron with scrap iron and coke is called
Wrought iron
Spongy iron
Cast iron
Steel
An eg of an oxide ore is
Cryolite
Bauxite
Chalcopyrite
malachite
The leaching of alumina from bauxite is carried out at _______ atom.
35-36
25-27
1-10
40-41
The diagram which predict the feasibility of thermal reduction of an ore is
Carnot's diagram
Ellingham diagram
All the above
None of the above
Sphalexite is
Cu2S
Cu2O
ZnS
ZnO