The main function of roasting is
To remove the volatile matter
To convert the ore into oxide
Both (a) and (b)
To make slag
The metal getting from blast furnace is
Steel
Medium steel
Pig iron
Mild steel
In the extraction of copper, the reaction which does not take place in Bessemer converter is
2CuFeS2 + O2 → Cu2S + FeS + SO2
2Cu2O + Cu2S → 6Cu + SO2
2Cu2S + 3O2 → 2Cu2O + 2SO2
2FeS + 3O2 → 2FeO + 2SO2
Which of the following substances cannot be used as a starting material for the preparation of ammonia?
Urea
Nitrobenzene
Ammonium salts
Metal nitrides
Which method is used to concentrate the ore of Aluminium?
Leaching
Froth floatation
Magnetic separation
Calcination
Aluminium is extracted by the electrolysis of
Bauxite
Alumina
Alumina mixed with molten cryolite
Molten cryolite
Metals are seperated from
Ore
Compounds
Minerals
Metallic oxides
During the extraction of iron from haematite ore, the produced slag is
BeSiO3
MgSiO3
FeSiO3
CaSiO3
Which of the following metal is leached by cyanide process?
Ag
Na
Al
Cu
The flux CaO is used to remove gang.This is getting from
CaCO3
CO
Ca(OH)2
boron