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(1)Brass:-Which is alloy of zinc and copper is used for
utensils and cartridge cases
(2)Bronze:-An alloy of cropper and tin is used for coins,
bells, utensils and statutes
(3)Aluminium bronze:- An alloy of aluminium, copper is used
for making coins, trays and picture frames
(4)Duralumin:- An alloy of aluminium, copper, manganese and
mangnesium is used in airship
(5)Fourteen carrot gold:- An alloy of gold, silver and
copper is used for watches cases, fountain pen nibs
(6)Guinee gold:-Is an alloy of gold and copper and it is
used for ornaments
(7)Montel metal:-Is an alloy of copper, nickel, manganese
and irons. It is used for acid containsers
(8)Metallurgy:--It is the branch of science which deals with
the methods of extraction of metals from their ores and
preparation of alloys
(9)Ore:-Mineral from which the metal can be economically
extracted is known as ore
Ores are generally obtained form ground and these contains
large quantities of impurities. These unwanted impurities
e.g. sand rocky matter lime-stone etc.. Which are present in
an ore is known as gague or matrix. The first of all these
unwanted impurities present in ore are removed. These
process of removal of impurities technically is termed as
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