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Regarding extraction of copper from copper pyrites, the incorrect statement is

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Copper matte is $C u_{2} S +$ little $F e S$

Copper is obtained by auto reduction

Principle involved in copper matte is that copper has greater affinity towards oxygen and iron has greater affinity towards sulphur

Slag formed is ${FeSiO}_{3}$

answer is C.

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Detailed Solution

Copper is extracted from copper pyrites by heating in a bessemer converter. The method is based on the principle that iron has less affinity for oxygen then sulfur at high temperature. sulfur has less affinity for oxygen at high temperature

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