1.

Which of the followin reactions Is not involved in Serpeck's process of leaching of Al_(2)O_(3) from white bauxite ore?

Answer»

`Al_(2)O_(3)+N_(2)+3C overset(Delta)to 2AIN+3CO`
`SiO_(2)+N_(2)+C overset(Delta)to Si+2CO`
`Na_(2)CO_(3)+Al_(2)O_(3) overset(Delta)to 2NaAlO_(3)+CO_(2)`
`2AL(OH)_(3) oversert(Delta)to Al_(2)O_(3)+3H_(2)O`

Solution :`Na_(2)CO_(3)+Al_(2)O_(3) overset(Delta)to 2NaAlO_(2)+CO_(2)` is involved in Hall's process.


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