The main ore of iron is
Haematite
Calcinite
Bauxite
Epsom
Copper is extracted from the ore
Copper sulphide
Copper pyrites
Copper sulphate
Copper chloride
The first explosive used for warfare and in mining and quarrying
Trinitrotoluene
Gun powder
Ammonium nitrate
Nitroglycerine
Nitro chalk is an example of
Compound fertilizer
Straight N fertilizer
NPK fertilizer
Nitrogenous fertilizer
Concentrated Sodium Chloride solution is called
Oleum
Brine
Galena
Vinegar
The major impurity in Iron ore is
Calcium oxide
Silica
Clay
Mud
The ore of aluminium is
Nitram is
Ammonium chloride
Ammonium hydroxide
Ammonium sulphate
The iron produced by the blast furnace is known as
Wrough iron
Steel
Molten iron
Cast iron
Sulphuric acid is manufactured by the process called
Ostwald process
Koope's process
Contact process
Hall's process