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

tin from $S n O_{2}$

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iron from $F e_{2} O_{3}$

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aluminium from $A l_{2} O_{3}$

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magnesium from $M g C O_{3}, C a C O_{3}$

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Solution

The correct options are
C
aluminium from $A l_{2} O_{3}$

D
magnesium from $M g C O_{3}, C a C O_{3}$

AI 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 $S n O_{2} + C 1300^{\circ} C - --- \to S n + C O_{2}$
$2 F e_{2} O_{3} 3 C Δ - \to 4 F e + 3 C O_{2}$

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

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