In the extraction of aluminium:Process X: app | vedclass

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(A) Bayer's process is used for the purification of red bauxite,which contains iron oxide as the main impurity.Serpeck's process is used for the purif

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$X = 	ext{Baeyer's process and } Z = SiO_2$

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(A) Bayer's process is used for the purification of red bauxite,which contains iron oxide as the main impurity.Serpeck's process is used for the purification of white bauxite,which contains silica $(SiO_2)$ as the main impurity.The chemical reaction to remove silica in Serpeck's process is:$SiO_2 + 2C + N_2 \rightarrow Si + 2CO$ (or formation of $AlN$ depending on conditions).Therefore,$X$ is Baeyer's process and $Z$ is $SiO_2$.

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:

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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: