MEDIUMMCQ SINGLENEET ChemistryInorganic Chemistryp-Block (group 13 and 14)Aluminium and Its Compounds In the purification of bauxite by Hall’s process:
A.bauxite is heated with lime
B.bauxite is heated with NaOH solution at 150 °C
C.bauxite is heated with Na₂CO₃ solution✓ Correct
D.bauxite is heated at 1800 °C in an atmosphere of N₂
Explanation
Bauxite ore is fused with 2 3 Na CO to give sodium meta- aluminate which is water soluble. 2 3 2 3 2 Al O Na CO heat NaAlO + + ®
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