Which of the following ores is concentrated b | vedclass

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(B) Leaching is a chemical process in which the powdered ore is treated with a suitable reagent that selectively dissolves the ore while leaving the i

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$Al_2O_3 \cdot 2H_2O$

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(B) Leaching is a chemical process in which the powdered ore is treated with a suitable reagent that selectively dissolves the ore while leaving the impurities in an undissolved state. Bauxite,which is the principal ore of aluminium $(Al_2O_3 \cdot 2H_2O)$,is concentrated using this method (Bayer's process). In this process,bauxite is treated with an aqueous solution of sodium hydroxide $(NaOH)$. Alumina dissolves to form soluble sodium aluminate,while impurities like ferric oxide $(Fe_2O_3)$,titanium oxide $(TiO_2)$,and silica $(SiO_2)$ remain undissolved. The chemical reaction is: $Al_2O_3(s) + 2NaOH(aq) + 3H_2O(l) \longrightarrow 2Na[Al(OH)_4](aq)$.

Which of the following ores is concentrated by the process of leaching?

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