The purification of alumina is called

• Correct answer
  A

  Baeyer's process
• B

  Bosch process
• C

  Castuer process
• D

  Hoop's process.

Solution

Baeyer's process $=$ Bauxite ore is roasted as to convert $\mathrm{FeO}$ into $\mathrm{Fe}_2 \mathrm{O}_3$

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