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Q.

Which of the following reactions is not involved in Serpeck's process of leaching of Al2O3 from white bauxite ore?

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a

SiO2+C⟶ΔSi+2CO

b

Na2CO3+Al2O3⟶Δ2NaAlO2+CO2

c

2Al(OH)3⟶ΔAl2O3+3H2O

d

Al2O3+N2+3C⟶Δ2AlN+3CO

answer is C.

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Detailed Solution

In the Hall-Heroult method, bauxite and cryolite are combined with the alumina produced by processing the ore, and then electrolyzed.

Na2CO3+Al2O3⟶Δ2NaAlO2+CO2 is involved in Hall's process. 

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