The purpose of smelting an ore is
To oxidise it
To reduce it
To separate volatile impurities
To obtain an alloy
The metal getting from blast furnace is
Steel
Medium steel
Pig iron
Mild steel
Which of the following metal is leached by cyanide process?
Ag
Na
Al
Cu
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
Bauxite is the ore of
Potassium
Iron
Copper
Aluminium
Metals are seperated from
Ore
Compounds
Minerals
Metallic oxides
Aluminium is extracted by the electrolysis of
Bauxite
Alumina
Alumina mixed with molten cryolite
Molten cryolite
The flux CaO is used to remove gang.This is getting from
CaCO3
CO
Ca(OH)2
boron
The important oxide ore of iron is
Siderite
Haematite
