1.

Which of thefollowing reactions is not involved in extraction of Cu from copper pyrite ?

Answer»

`Cu_(2)S * Fe_(2)S_(3) +4O_(2) rarr Cu_(2)S+2FeO+3SO_(2)uparrow`
`Cu_(2)O+FeS rarr Cu_(2)S+FeO`
`2CuO rarr 2Cu+O_(2)`
`FeO+ SiO_(2) rarrFeSiO_(3)`

ANSWER :C


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