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Why partial roasting of sulphide ore is done in the metallurgy of copper ?A. Auto-reduction of `Cu_(2)O` formed is carried out by remaining `Cu_(2)S` in the reaction.B. Cu is separated out by partial reduction due to sedimentationC. Due to difference in gravity `Cu_(2)O` and `Cu_(2)S` are separated.D. Complete roasting cannot be done in one step hence partial roasting is done. |
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Answer» Correct Answer - A Partial roasting of sulphide ore forms some oxide. This oxide then reduces the remaining sulphide ore into metal. `2Cu_(2)S + 3O_(2) to 2Cu_(2)O + 2SO_(2)` `2Cu_(2)O + Cu_(2)S to 6Cu + SO_(2)` This process is called autoreduction. |
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