Bayer's process is used for the purification | vedclass

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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.

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

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