In the commercial electrochemical process for Aluminium extraction, the electrolyte used is: Options: A . &nbspAl(OH)3 in NaOH B . &nbspAn aqueous solution of Al2(SO4)3 C . &nbspA molten mixture of Al2O3 & Na3AlF6 D . &nbspA molten mixture of Al2O3 & Al(OH)3

Answer: Option C : C In the electrolytic extraction of Aluminium, purified alumina is mixed with N a 3 A l F 6 and C a F 2 . Cryolite ( N a 3 A l F 6 ) helps dissolve Alumina and lowers the melting point of this mix to about 1050 ∘ C . Pure Alumina melts at about 2100 ∘ C . C a F 2 is added to enhance the conductivity. As shown in the above image, the surface on the inside of the steel case is coated with a graphite lining, which acts as the cathode. The electrolyte is a molten mixture of cryolite, molten Alumina and C a F 2 .

In the commercial electrochemical process for Aluminium extraction, the electrol

Question

In the commercial electrochemical process for Aluminium extraction, the electrolyte used is:

Options:

A . Al(OH)3 in NaOH

B . An aqueous solution of Al2(SO4)3

C . A molten mixture of Al2O3 & Na3AlF6

D . A molten mixture of Al2O3 & Al(OH)3

Answer: Option C
:
C
In the electrolytic extraction of Aluminium, purified alumina is mixed with

N a_{3} A l F_{6}

and

C a F_{2}

. Cryolite

(N a_{3} A l F_{6})

helps dissolve Alumina and lowers the melting point of this mix to about 1050

^{\circ} C

. Pure Alumina melts at about 2100

^{\circ} C

C a F_{2}

is added to enhance the conductivity.

In The Commercial Electrochemical Process For Aluminium Extr...

As shown in the above image, the surface on the inside of the steel case is coated with a graphite lining, which acts as the cathode. The electrolyte is a molten mixture of cryolite, molten Alumina and