Question

The significance of leaching in the extraction of aluminium is

• A. It helps removing the impurities like $SiO_{2},Fe_{2}O_{3}$ etc. from the bauxite ore
• B. It converts the ore into oxide
• C. It reduces melting point of the ore
• D. It eliminates water from bauxite

Answer 1

Answer: (A)

It helps removing the impurities like $SiO_{2},Fe_{2}O_{3}$ etc. from the bauxite ore

Answer 2

Leaching removes the impurities like $SiO_{2},Fe_{2}O_{3}$ etc. from the bauxite ore and pure$Al_{2}O_{3}$ is obtained.