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Q.

Observe the following statements regarding purification of bauxite : I. During Hall’s process, silica is removed as Si (vapour).II. Bauxite ore contaminated with Fe2O3 is purified in Baeyer’s process.III. During Serpeck’s process, AlN  is formed. The correct answer is.

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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 is D.

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Detailed Solution

halls process is purification of alumina, in which iron oxide impurity
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Observe the following statements regarding purification of bauxite : I. During Hall’s process, silica is removed as Si (vapour).II. Bauxite ore contaminated with Fe2O3 is purified in Baeyer’s process.III. During Serpeck’s process, AlN  is formed. The correct answer is.