In the leaching of alumina from bauxite, the ore expected to leach out in the process by reacting with NaOH is :

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In the leaching of alumina from bauxite, the ore expected to leach out in the process by reacting with NaOH is :

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Kanishk01 · Answer 1 · 2021-08-05T07:03:33+0000

Answer is : (4) SiO₂

In bauxite impurities of Fe₂O₃, TiO₂ and SiO₂ are present , Fe2O₃ and TiO₂ are basic oxides therefore does not reacts with or dissolve in NaOH whereas SiO₂is acidic oxide it gets dissolve in NaOH, hence leach out

SiO₂ + 2NaOH → Na₂SiO₃(aq.) + H₂O

In the leaching of alumina from bauxite, the ore expected to leach out in the process by reacting with NaOH is :

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