Which of the following is not correctly match | vedclass

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(D) In the extraction of copper from copper glance $(Cu_2S)$,the process involves roasting the ore in air to convert part of $Cu_2S$ into $Cu_2O$. The

Vedclass · Accepted Answer

$Cu_2S 	o Cu$: Roasting followed by carbon reduction

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(D) In the extraction of copper from copper glance $(Cu_2S)$,the process involves roasting the ore in air to convert part of $Cu_2S$ into $Cu_2O$. Then,the remaining $Cu_2S$ reacts with $Cu_2O$ in a process known as self-reduction (or auto-reduction) to produce metallic copper $(Cu_2S + 2Cu_2O 	o 6Cu + SO_2)$. Carbon reduction is not used for $Cu_2S$ because copper has a lower affinity for oxygen than carbon at high temperatures,and self-reduction is more efficient. Therefore,option $D$ is incorrectly matched.

Which of the following is not correctly matched?

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