Answer:
(i)
Though several ores contain aluminium, it is' from bauxite that a clay- like
substance alumina and later aluminium are obtained.
(ii) Bauxite deposits are formed by the decomposition of a wide variety
of rocks rich in aluminium silicates.
(iii) Aluminium is an important metal because it combines
the strength of metals such as iron with extreme lightness and also with good conductivity
and great malleability.
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