General Princip...

In the extraction of aluminium by electrolytic process, cryolite is added to ________.

In the extraction of aluminium the electrolyte is:

Zone refining method is used for refining:

Which of the following metal is refined by distillation method?

Aluminium is obtained by the electrolysis of pure $$Al_{2}O_{3}$$, dissolved in:

Cryolite is used in the electrolytic extraction of aluminium, because ___________ .

Which of the following technique is used in the manufacture of aluminium from bauxite?

The solubility of impurities in a metal in molten and solid states is different. This is principle involved in the refining of a metal by which of the following methods?

Observe the following statements regarding purification of bauxite:
I. During Hall's process, silica is removed as Si (vapour).
II. Bauxite ore contaminated with  $$Fe_{2} O_{3}$$ is purified in Baeyer's process.
III. During Serpeck's process, $$AlN$$ is formed.

Identify the reaction during electrolytic reduction of alumina at cathode.