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In the extraction of Cu the reaction that takes place in Bessemer converter is :

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$2 FeS + 3 O_{2} ⟶ 2 FeO + 2 {SO}_{2}$

$2 {CuFeS}_{2} + O_{2} ⟶ {Cu}_{2} S + FeS + {SO}_{2}$

$2 {Cu}_{2} O + {Cu}_{2} S ⟶ 6 Cu + {SO}_{2}$

$2 {Cu}_{2} S + 3 O_{2} ⟶ 2 {Cu}_{2} O + 2 {SO}_{2}$

answer is A.

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Detailed Solution

The copper-supplied ore is heated in the air until some of it turns into oxide, and then it is heated once again without air to allow the oxide to react with the unaltered supplied.

A Bessemer converter or a Pierce-Smith converter can be used to self-reduce CuS to Cu.

$2 {Cu}_{2} O + {Cu}_{2} S \to 6 Cu + {SO}_{2}$

Hence, option A is correct.

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