Question

In the extraction of aluminium
Process $X$ : applied for red bauxite to remove iron oxide {chief impurity}
Process $Y$ : (Serpeck's process) : applied for white bauxite to remove $z$ {chief impurity} then process $X$ and impurity $Z$ are________.

• A. $X$= Hall and Heroult's process and $Y$= $Si{O}_2$
• B. $X$= Baeyer's process and $Y$ = $Si{O}_2$
• C. $X$= Serpeck's process and $Y$= iron oxide
• D. $X$= Baeyer's process and $Y$= iron oxide

Answer 1

The correct option is B $X$= Baeyer's process and $Y$ = $Si{O}_2$

Red Bauxite (which contains iron oxide as the main impurity) is purified by Bayer's process or Hall's process.

White bauxite (which contains silica as chief impurity) is purified by Serperck's process.