Question

Aluminium oxide and reactive oxide like magnesium oxide calcium oxide are not reduced by carbon

Answer 1

*Firstly , reduction of oxide ores of metals with

carbon requires a very high temperature. For

example:-2 Al2O3 + 3C= 4Al+3CO2 (at 5000°c).

*Secondly , at this high temperature the metal

will react with carbon and form metal carbide

and evaporate leaving nothing. For example

:-4Al+3C =Al4C3.

Also, reactive metals such as aluminium are extracted by electrolysis, while a less-reactive metal such as iron may be extracted by reduction with carbon or carbon monoxide.

hope it helps!!!