Multiple choice

Iron obtained from Fe2O3 contains a lot of carbon, silicon & other impurities. These are removed by

  1. electrolytic refining

  2. distillation

  3. oxidative refining

  4. sublimation

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Oxidative refining (or cupellation/puddling) is used to remove impurities like carbon and silicon from iron by oxidizing them into gases or slag.