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Which of the following is not an example of roasting ?A. `2ZnS + 3O_(2) to 2ZnO+2SO_(2)`B. `2PbS+3O_(2) to 2PbO+2SO_(2)`C. `2Cu_(2)S + 3O_(2) to 2Cu_(2)O + 2SO_(2)`D. `2Cu_(2)O + Cu_(2)S to 6Cu + SO_(2)`

Answer» Correct Answer - D
It is an example of auto-reduction in which unoxidised copper sulphide reduces copper oxide.


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