In order to obtain 1 tonne of aluminium, 4 tonnes of bauxite, 150 | Filo
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Class 12

Chemistry

Metallurgy

General Principles and Processes of Isolation of Elements

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In order to obtain 1 tonne of aluminium, 4 tonnes of bauxite, 150 kg of sodium hydroxide and 600 kg of graphite is required. The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (III) oxide, Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.
In construction work, why is the alloy of aluminium(duralumin) used rather than pure aluminium?

Solution: In construction, the alloy of aluminium(duralumin) is used because it is hard and resistant to corrosion.
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general principles and processes of isolation of elements