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

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(B) Bayer's process is used for the concentration (beneficiation) of red bauxite,which contains iron oxide as the main impurity.Serpeck's process is u

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$X =$ Baeyer's process and $Z = SiO_2$

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(B) Bayer's process is used for the concentration (beneficiation) of red bauxite,which contains iron oxide as the main impurity.Serpeck's process is used for the concentration of white bauxite,which contains silica $(SiO_2)$ as the main impurity.In Serpeck's process,the silica impurity is removed by heating with carbon and nitrogen: $SiO_2 + 2C + N_2 \rightarrow Si_3N_4 + 2CO$ (or simplified as $SiO_2 + 2C \rightarrow Si + 2CO$ in some contexts).Therefore,process $X$ is Baeyer's process and impurity $Z$ 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: