TS EAMCET · Chemistry · General Principles and Processes of Isolation of Metals
Observe the following statements regarding purification of bauxite
I. During Hall's process, silica is removed as Si (vapour).
II. Bauxite ore contaminated with \(\mathrm{Fe}_2 \mathrm{O}_3\) is purified in Baeyer's process.
III. During Serpeck's process, AlN is formed.
The correct answer is
- A I, II and III are correct
- B Only I and II are correct
- C Only I and III are correct
- D Only II and III are correct
Answer & Solution
Correct Answer
(D) Only II and III are correct
Step-by-step Solution
Detailed explanation
Red bauxite which contains \(\mathrm{Fe}_2 \mathrm{O}_3\) as the main impurity, is refined either by Baeyer's process or by Hall's process. White bauxite containing \(\mathrm{SiO}_2\) impurity is refined by Serpeck's method. In Serpeck's method, following reactions take place.…
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