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Observe the following statements regardi...

Observe the following statements regarding purification of bauxite.
I. During Hall's producess, silica is removed as Si (vapour).
II. Bauxite ore contaminated with `Fe_(2)O_(3)` is purified by 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

Text Solution

Verified by Experts

The correct Answer is:
D
II. Bayer's process is used to purify red bauxite which has `Fe_(2)O_(3)` as impurity.
III. The reaction occuring in serpeck's method is as follows:
`Al_(2)O_(3).2H_(2)O+3C+N_(2) overset(1800^(@)C)to 2AlN+3CO+2H_(2)O`
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