Sodium is obtained by the electrolysis of
Brass is a mixture of
Brass is a mixture of 80% Cu & 20% Zn.
The process to heat the ore in the presence of excess supply of air below its melting point is called
The process of extraction of metal from its ores, is known as
Aluminium is used in thermite welding because –
Fe2O3(s) + 2Al(s) → Al2O3(s) + 2Fe(l)
Which reducing agent is used in chemical reduction?
Removal of impurities from ore is known as –
Which of the following is anoxide ore?
Bauxite – Al2O3 Halmatite– Fe2O3 Cuprite – Cu2O
Calcination is the process of heating the ore
Which ore contains both iron and copper?
Among cuprite [Cu2O], Chalcocite [Cu2S], Chalcopyrite [CuFeS2] and Malachite[Cu(OH)2CuCO3], only Chalcopyrite is an ore which contains both Fe and Cu.