Zone refining is carried out in
Ge
Si
Zn
Both a and b
In the electrolytic cell for the extraction of Al ,the gases formed in anode are
O2 and CO2
CO and CO2
CO and O2
CO2 and N2
In the metallurgy of aluminium purified Al2O3 is mixed with
CaF2
Aluminium silicate
Na3AlF6
A or C
In Aluminium thermic process ,Aluminium act as
An oxidizing agent
Neutral substance
Reducing agent
Flux
In the leaching of alumina from bauxite which is used
NaOH
NaCl
Na2CO3
NaF
Two sulphide ions are separated by using
Collector
Depressant
Froth stabilizer
Magnetic field
Melting pig iron with scrap iron and coke is called
Wrought iron
Spongy iron
Cast iron
Steel
The naturally occuring chemical substances in the earth's crust obtainable by mining are called _______ .
Ores
Gangue
Minerals
The chemical formula of bauxite is
Al2O3
Al2O3.2H2O
KAlSi3O8
In the metallurgy of silver and gold,the leaching agents are
NaCN and O2
NaCN and CO2
KCN and O2
'a' or 'c'
