1.

The reaction not involved in the concentration of bauxite are by Hall's process is

Answer»

`Al_(2)O_(3)+ Na_(2)CO_(3) to 2NaAlO_(3)+CO_(2)`
`2NaAlO_(2)+3H_(2)O+CO_(2) to 2Al(OH)_(3)+Na_(2)CO_(3)`
`2Al(OH)_(3) to Al_(2) O_(3)+3H_(2)O`
`AlN+H_(2)O to AL (OH)_(3)+NH_(3)`

Answer :D


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