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Copper Matte is extracted from copper pyrites ore by heating it in blast furnace. The method is based on the principle that:

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iron has less affinity for oxygen than sulphur at high temperature

copper has less affinity for oxygen than sulphur at high temperature

copper has more affinity for oxygen than sulphur at high temperature

sulphur has less affinity for oxygen at high temperature

answer is D.

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Detailed Solution

$\begin{array}{l} 2 {CuFeS}_{2} + O_{2} \to {Cu}_{2} S + 2 FeS + {SO}_{2} \\ FeS + \frac{3}{2} O_{2} \to FeO + {SO}_{2} ↑ \\ FeO + {SiO}_{2} \to {FeSiO}_{3} \end{array}$

(Remain ${Cu}_{2} S$ is called matte)

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