Questions
The process used for purification of bauxite ore containing high silica content as impurity is ____?
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a
Baeyer’s Process
b
Hall's Process
c
Hoope’s Process
d
Serpeck's Process
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Correct option is D
Serpeck's process is used to purify bauxite which contains silica as impurity. Powdered ore is mixed with coke and heated to 1800∘C in a current of nitrogen. Silicon dioxide is reduced to silicon vapor and escapes while Al is converted to aluminium nitride which is further hydrolysed.
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