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General Principles and processes of Isolation of Elements
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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 $Y = SiO_2$
B
$X =$ Baeyer's process and $Y = SiO_2$
C
$X =$ Serpeck's process and $Y =$ iron oxide
D
$X =$ Baeyer's process and $Y =$ iron oxide
Solution
Bayer's process is used for benficiation of red bauxite. Serpeck's process is used for benficiation of white bauxite.
Reaction to remove impurity;
$SiO _2+2 C \rightarrow Si +2 CO$
Standard 12
Chemistry
