Q.
The correct statements among the following are
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a
the principal ore of aluminium is bauxite
b
the aluminate in solution is neutralised by passing CO2 gas and hydrated Al2O3 is precipitated
c
impurities present in bauxite are SiO2 and TiO2
d
sodium silicate remain intact with hydrated alumina
answer is A.
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Detailed Solution
The sodium silicate remains in the solution and hydrated alumina is filtered, dried and heated.
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