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NEETChemistryGeneral Principles and Processes of Isolation of Metals

Which of the following equations correctly represents a step in the Bayer's Process for extracting alumina from bauxite ores associated with silica?( in the above question )

Options

  1. AAl 2 O 3 + 2NaOH + 3H 2 O → 2Na[Al(OH) 4 ]
  2. BSiO 2 + 2NaOH → Na 2 [Si(OH) 6 ]
  3. C2Na[Al(OH) 4 ] - (heat) → Al 2 O 3 + 2NaOH + 3H 2 O
  4. DNa 2 [Si(OH) 6 ] - (heat) → SiO 2 + 2NaOH + 3H 2 O

Correct answer

C. 2Na[Al(OH) 4 ] - (heat) → Al 2 O 3 + 2NaOH + 3H 2 O

Step-by-step solution

Correct Option is : (C) 2Na[Al(OH) 4 ] - (heat) → Al 2 O 3 + 2NaOH + 3H 2 O

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