Advanced 2013 | JEE 2013 | Discussion Page

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

A) tin from

$SnO_{2}$

B) iron from

$Fe_{2}O_{3}$

C) aluminium from

$Al_{2}O_{3}$

D) magnesium from

$MgCO_{3},CaCO_{3}$

Answer:

Option C,D

Explanation:

Al has a 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

$SnO_{2}+C$ $\underrightarrow{1300^{0}C}$ $Sn+CO$

$2Fe_{2}O_{3}+3C$ $\underrightarrow{\triangle}$ $4Fe+3CO_{2}$

Discussion Forum

Answer:

Explanation: