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Choose the correct statement regarding extraction of aluminium from Bauxite ore:

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During the serpeck process pungent smelling gas ${NH}_{3}$ is release.

Cryolite, Fluorspar and ${Al}_{2} O_{3}$ serve as a electrolyte during Hall-Heroult process

Both $(1)$ and $(2)$

${Na}_{2} {CO}_{3}$ is used as a leaching agent in Baeyer process.

answer is C.

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Detailed Solution

$(1)$ In Serpeck process

$White bauxite \to_{with C + current of N_{2}}^{Heat} AlN + HOH \to Al {(OH)}_{3} + {NH}_{3} (gas)$

$(2)$ Electrolytic reduction during Hall-Heroult process of $Al, {Na}_{3} {AlF}_{6} + {CaF}_{2} + {Al}_{2} O_{3}$ serve as a electrolyte

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