In the purification of bauxite by Hall's process

In the purification bauxite by Hall's process

Write three balanced equations for purification of bauxite by Hall's process in extraction of Al.

The important by product in the purification of bauxite by Serpeck's process is

The Product not involved in the concentration of bauxite are by Hall's process is

The reaction not involved in the concentration of bauxite are by Hall's process is

Observe of the following statements regarding purification of bauxite: (I) During Hall's process, silica is removed as Si(vapour) Bauxite ore contaminated with Fe_(2)O_(3) is purfied in Baeyer's process. During Serpeck's process, AIN is foremed The correct answer is:

Observe the following statements regarding purification of bauxite. I. During Hall's producess, silica is removed as Si (vapour). II. Bauxite ore contaminated with Fe_(2)O_(3) is purified by Baeyer's process. III. During Serpeck's process. AlN is formed. The correct answer is