Which of the following reactions is not...

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

A

`Cu_(2)S * Fe_(2)S_(3) +4O_(2) rarr Cu_(2)S+2FeO+3SO_(2)uparrow`

B

`Cu_(2)O+FeS rarr Cu_(2)S+FeO`

C

`2CuO rarr 2Cu+O_(2)`

D

`FeO+ SiO_(2) rarr FeSiO_(3)`

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The correct Answer is:

C

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