Give important uses of copper and aluminium
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Aluminium
Aluminium foils are used as wrappers for chocolates.
The fine dust of the metal is used in paints and lacquers.
Aluminium, being highly reactive, is also used in the extraction of chromium and manganese from their oxides. Wires of aluminium are used as electricity conductors.
Alloys containing aluminium, being light, are very useful.
Copper
Copper is used for making wires used in electrical industry and for water and steam pipes.
It is also used in several alloys that are rather tougher than the metal itself, e.g., brass (with zinc), bronze (with tin) and coinage alloy (with nickel).
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Copper and aluminium are most frequently used as the electrical conductors in electrical cables due to their low resistance and excellent conductivity. These metals are both ductile and relatively resistant to corrosion, but they also have different properties which make them useful for various applications.
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