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In the purification of bauxite by Hall's...

In the purification of bauxite by Hall's process

A

The bauxite ore is heated with concentrated NaOH solution at `150^(@)C`

B

The bauxite ore is heated with `NaHCO_(3)`

C

The bauxite ore is mixed with coke and heated at `1800^(@)C` in a current of `N_(2)`

D

The bauxite ore is fused with `Na_(2)CO_(3)`

Text Solution

Verified by Experts

The correct Answer is:
D
In the purification of bauxite by Hall.s process the ore is fused with `Na_(2)CO_(3)`
`Al_(2)O_(3)+Na_(2)CO_(3) to 2NaAlO_(2)+CO_(2)`
`2NaAlO_(2)+CO_(2)+3H_(2)O to 2Al(OH)_(3)+Na_(2)CO_(3)`
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