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

Question

In the leaching of alumina from bauxite, the ore expected to leach out in the process by reacting with NaOH is : (A) TiO 2 (B) Fe 2 O 3 (C) ZnO (D) SiO 2

Tardigrade Admin · Accepted Answer

In bauxite impurities of Fe 2 O 3, TiO 2 and SiO 2 are present, Fe 2 O 3 and TiO 2 are basic oxides therefore does not reacts with or dissolve in NaOH whereas SiO 2 is acidic oxide it gets dissolve in NaOH, hence leach out SiO 2+2 NaOH arrow Na 2 SiO 3 (aq.) + H 2 O

Q. In the leaching of alumina from bauxite, the ore expected to leach out in the process by reacting with $N a O H$ is :

$T i O_{2}$

$F e_{2} O_{3}$

$Z n O$

$S i O_{2}$

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

TiO2​

Fe2​O3​

ZnO

SiO2​

In bauxite impurities of Fe2​O3​,TiO2​ and SiO2​ are present, Fe2​O3​ and TiO2​ are basic oxides therefore does not reacts with or dissolve in NaOH whereas SiO2​ is acidic oxide it gets dissolve in NaOH, hence leach out SiO2​+2NaOH→Na2​SiO3​ (aq.) +H2​O

Q. In the leaching of alumina from bauxite, the ore expected to leach out in the process by reacting with $N a O H$ is :

$T i O_{2}$

$F e_{2} O_{3}$

$Z n O$

$S i O_{2}$