JEE Advanced | 2013MetallurgyHard
Question
The carbon-based reduction method is NOT used for the extraction of
Options
A.tin from SnO2
B.Iron from Fe2O3
C.aluminium from Al2O3
D.magnesium from MgCO3.CaCO3
Solution
(A) 
SnO2 + 2C → Sn + 2CO ↑
SnO2 + 2CO → Sn + 2CO2 ↑
(B)
Fe2O3 + 3C → 2Fe + 3CO ↑
Fe2O3 + 3CO → 2Fe + 3CO2 ↑
(C)

(D)
In no process carbon is used as reducing agent.

SnO2 + 2C → Sn + 2CO ↑
SnO2 + 2CO → Sn + 2CO2 ↑
(B)

Fe2O3 + 3C → 2Fe + 3CO ↑
Fe2O3 + 3CO → 2Fe + 3CO2 ↑
(C)

(D)

In no process carbon is used as reducing agent.
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