If bauxite contains SiO_2 as an impurity,whic | vedclass

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(D) Bauxite ore often contains $SiO_2$,$Fe_2O_3$,and $TiO_2$ as impurities. When $SiO_2$ is the major impurity,Serpeck's process is used. In this proc

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Serpeck's process

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(D) Bauxite ore often contains $SiO_2$,$Fe_2O_3$,and $TiO_2$ as impurities. When $SiO_2$ is the major impurity,Serpeck's process is used. In this process,bauxite is heated with coke and nitrogen at $1800 \ ^\circ C$ to form aluminium nitride $(AlN)$,while $SiO_2$ is reduced to silicon $(Si)$ which volatilizes. $Al_2O_3 + 3C + N_2 \rightarrow 2AlN + 3CO$ $SiO_2 + 2C \rightarrow Si + 2CO$ The $AlN$ is then hydrolyzed to produce pure alumina.

$I$	$II$
$X$. Magnetic separation	$a$. $Ag_2S$
$Y$. Froth floatation	$b$. $FeCr_2O_4$
$Z$. Gravity separation	$c$. $Al_2(SiO_3)_3$

If bauxite contains $SiO_2$ as an impurity,which of the following methods can be used for its purification?

Similar Questions

The ore of which metal is concentrated by leaching?

Which method of concentration of ore is known as gravity separation?

The methods $NOT$ involved in the concentration of ore are:
$A$. Liquation
$B$. Leaching
$C$. Electrolysis
$D$. Hydraulic washing
$E$. Froth flotation
Choose the correct answer from the options given below:

Which one of the following ores is best concentrated by froth floatation method?

Match the method of concentration of the ore in column $I$ with the ore in column $II$ and select the correct alternate :

$I$ $II$

$X$. Magnetic separation $a$. $Ag_2S$

$Y$. Froth floatation $b$. $FeCr_2O_4$

$Z$. Gravity separation $c$. $Al_2(SiO_3)_3$

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