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Question

(D) Chemical leaching (or hydrometallurgy) is a process used to extract metals from their ores by dissolving them in a suitable solvent. $Al_2O_3 \cdo

Vedclass · Accepted Answer

$Al_2O_3 \cdot 2H_2O$

Vedclass · Answer

(D) Chemical leaching (or hydrometallurgy) is a process used to extract metals from their ores by dissolving them in a suitable solvent. $Al_2O_3 \cdot 2H_2O$ (Bauxite) is concentrated by the Bayer's process,which is a form of chemical leaching where the ore is treated with a concentrated solution of $NaOH$ to dissolve the alumina as sodium aluminate,leaving behind impurities like $Fe_2O_3$ and $SiO_2$. Therefore,chemical leaching is specifically useful for the concentration of $Al_2O_3 \cdot 2H_2O$.

Chemical leaching is useful in the concentration of

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