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(B) Bayer's process is specifically used for the purification of Bauxite $(Al_2O_3 \cdot 2H_2O)$ ore when the main impurity present is Silica $(SiO_2)

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Silica

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(B) Bayer's process is specifically used for the purification of Bauxite $(Al_2O_3 \cdot 2H_2O)$ ore when the main impurity present is Silica $(SiO_2)$.In this process,the ore is treated with a concentrated solution of $NaOH$ at high temperature and pressure.$Al_2O_3$ dissolves to form soluble sodium aluminate,while $SiO_2$ also dissolves to form sodium silicate.However,the process is designed to separate the alumina from the impurities,particularly silica,which is the most common impurity in Bauxite.

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

Bayer's process is used for the purification of Bauxite containing which of the following as an impurity?

Similar Questions

Explain the concentration of ore by Magnetic Separation.

The ore which is concentrated by wetting with oil is:

In the froth flotation process for the concentration of ores,why do the ore particles float?

Which one of the following is true?

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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