Observe the following statements regarding purification of bauxite (I) During Hall's process, silica, is removed as Si (vapour). (II)Bauxite ore contaminated with iron oxide is purified in Baeyer's process. (III) During Serpeck's process silica, is removed as Si (vapour).

Question

Observe the following statements regarding purification of bauxite (I) During Hall's process, silica, is removed as Si (vapour). (II)Bauxite ore contaminated with iron oxide is purified in Baeyer's process. (III) During Serpeck's process silica, is removed as Si (vapour). (A) I, II and III (B) Both II and III (C) Both I and III (D) Both I and II

Tardigrade Admin · Accepted Answer

Hall process Al 2 O 3+ Na 2 CO 3 longrightarrow 2 NaAlO 2+ CO 2 Baeyer's process Al 2 O 3+2 NaOH +3 H 2 O longrightarrow 2 Na [ Al ( OH )4] Sepeck's process Al 2 O 3+3 C + N 2 longrightarrow 2 AlN +3 CO and SiO 2+2 C longrightarrow Si + CO

Q. Observe the following statements regarding purification of bauxite
(I) During Hall's process, silica, is removed as $S i$ (vapour).
(II)Bauxite ore contaminated with iron oxide is purified in Baeyer's process.
(III) During Serpeck's process silica, is removed as $S i$ (vapour).

I, II and III

Both II and III

Both I and III

Both I and II

Hall process $A l_{2} O_{3} + N a_{2} C O_{3} ⟶ 2 N a A l O_{2} + C O_{2}$

Baeyer's process $A l_{2} O_{3} + 2 N a O H + 3 H_{2} O ⟶ 2 N a [A l (O H)_{4}]$

Sepeck's process $A l_{2} O_{3} + 3 C + N_{2} ⟶ 2 A lN + 3 CO$ and $S i O_{2} + 2 C ⟶ S i + CO$

Q. Observe the following statements regarding purification of bauxite (I) During Hall's process, silica, is removed as Si (vapour). (II)Bauxite ore contaminated with iron oxide is purified in Baeyer's process. (III) During Serpeck's process silica, is removed as Si (vapour).