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MHT CET202014 Oct 2020Morning ShiftChemistryGeneral Principles and Processes of Isolation of MetalsActual

What is the product formed when bauxite ore is treated with sodium hydroxide?

Options

  1. ASodium meta aluminate
  2. BAluminium hydroxide
  3. CSodium aluminate
  4. DSodium hydrogen carbonate

Correct answer

A. Sodium meta aluminate

Step-by-step solution

Conc. sodium hydroxide. Bauxite ore is finely divided and heated under pressure with concentrated caustic soda solution at 150^ C to obtain sodium meta-aluminate. The following reaction is as follows: Bauxite Al ₂ O ₃ .2 H ₂ O +2 NaOH 150⁰ C 2 NaAlO ₂+ sodium meta aluminate 3 H ₂ O

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