Q11 / 150 · MHT CET 2020 (14 Oct Shift 1) · Chemistry

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

  • Correct answer
    A
    Sodium meta aluminate
  • B
    Aluminium hydroxide
  • C
    Sodium aluminate
  • D
    Sodium hydrogen carbonate

Solution

Conc. sodium hydroxide. Bauxite ore is finely divided and heated under pressure with concentrated caustic soda solution at $150^{\circ} \mathrm{C}$ to obtain sodium meta-aluminate. The following reaction is as follows: $\underset{\text { Bauxite }}{\mathrm{Al}_{2} \mathrm{O}_{3} .2 \mathrm{H}_{2} \mathrm{O}+2 \mathrm{NaOH}} \stackrel{150^{0} \mathrm{C}}{\longrightarrow} 2 \mathrm{NaAlO}_{2}+\underset{\text { sodium meta aluminate }}{3 \mathrm{H}_{2} \mathrm{O}}$

Hence, the correct answer is option: 'A'.

Relevant Questions