The carbon-based reduction method is not used for the extrac... | Chemistry | SolveeIt

Question

The carbon-based reduction method is not used for the extraction of

tin from $SnO_2$

iron from $Fe_2O_3$

aluminium from $Al_2O_3$

magnesium from $MgCO_3 . CaCO_3$

Answer

magnesium from $MgCO_3 . CaCO_3$

Explanation

Solution

Al has greater affinity for oxygen, hence oxide is not reduced by carbon. MgO and CaO (formed in the calcination from carbonates) are stable species and not reduced by carbon.
During Smelting $SnO_2+C_2\xrightarrow{1300^{\circ}C}Sn+CO$
$2Fe_2O_3+3C\xrightarrow{\Delta}4Fe+3CO_2$

Chemistry Question on General Principles and Processes of Isolation of Elements

Solution