Pure alumina is

Purification of impure alumina to pure alumina.

Which process is used to convert pure alumina into aluminium.

In the electrolytic reduction of pure alumina to pure aluminium - by Hall Herault's process, give the electrolytic reaction involved in the same, resulting in formation of aluminium at the cathode.

How can pure alumina be prepared from bauxite by Bayers process? Write the correct reactions.

Describe the role of (i) NaCN in the extraction of gold from its ore. (ii) Cryolite in the extraction of aluminium from pure alumina (iii) CO in the purification of Nickel.

Write the role of : (i) NaCn in the extraction of gold from its ore. (ii) Cryolite in the extraction of aluminium from pure alumina. (iii) Co in the purification of Nickel.

Write the role of : (i) NaCn in the extraction of gold from its ore. (ii) Cryolite in the extraction of aluminium from pure alumina. (iii) Co in the purification of Nickel.