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Which of the following is not an ore of magnesium?
Gypsum which is chemically represented as CaSO4.2H2O is not an ore of magnesium among the given choices.
Note:Carnallite is KCl.MgCl2.6H2O, magnesite is MgCO3 and dolomite is MgCO3.CaCO3
The substance used in the thermite process of reducing metal ores is
A mixture of Al powder and metallic oxide (Cr2O3,Mn3O4 etc.) is called thermite.
Furnaces are lined with calcium oxide because
Which of the following is the chief ore of copper?
The most common ore of copper is CuFeS2 which is commonly known as chalcopyrite.
In the blast furnace iron oxide is reduced by
Fe2O3 + 3CO ⟶ 2Fe + 3CO2
Aluminothermic process is used for the extraction of metals,whose oxides are
Aluminothermite process involves reduction of oxides which are not satisfactorily reduced by carbon such as Fe2O3, Mn2O4, Cr2O3, etc. to metals with aluminium.
Cr2O3 + 2Al ⟶ Al2O3 + 2Cr ∆H = -ve
General method for the extraction of metal from oxide ore is
Carbon reduction, Fe2O3 + 3C ⟶ 2Fe + 3CO
Solder is an alloy of lead with :
Solder is an alloy of lead (Pb) with tin (Sn). It contains about 30% Sn and 70% Pb.
The role of calcination in metallurgical operations is
Which one of the furnaces among the following can produce the highest temperature?