A) NaF
B) \[N{{a}_{3}}Al{{F}_{6}}\]
C) \[Al{{F}_{3}}\]
D) None of these
Correct Answer: B
Solution :
Pure alumina is a bad conductor of electricity and the fusion temperature of pure alumina is about \[2000{}^\circ C\] and at this temperature when the electrolysis is carried of fused mass the metal formed vapoureses as the boiling point of Al is \[1800{}^\circ C\]. To overcome this difficulty, \[N{{a}_{3}}Al{{F}_{6}}\] and \[Ca{{F}_{2}}\] are mixed with alumina.
You need to login to perform this action.
You will be redirected in
3 sec
