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COMEDK2015ChemistryGeneral Principles and Processes of Isolation of Metals

In the metallurgy of aluminium, when the fused matrix is electrolysed, the overall reduction reaction is

Options

  1. AAl ₂ O ₃+3 C 2 Al +3 CO
  2. BAl ₂ O ₃ 2 Al ³⁺+3 O ₂
  3. C2 Al ₂ O ₃+3 C 4 Al +3 CO ₂
  4. DAl ₂ O ₃+2 CO 2 Al +2 CO ₂

Correct answer

C. 2 Al ₂ O ₃+3 C 4 Al +3 CO ₂

Step-by-step solution

The overall reduction reaction of fused matrix is 2 Al ₂ O ₃+3 C 4 Al +3 CO ₂

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