First slide

13th group or boron group

Question

The process used for purification of bauxite ore containing high silica content as impurity is ____?

Moderate

A

Baeyer’s Process
B

Hall's Process
C

Hoope’s Process
D

Serpeck's Process

Solution

Serpeck's process is used to purify bauxite which contains silica as impurity. Powdered ore is mixed with coke and heated to $1800^{\circ} C$ 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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