A sulphide ore is first converted into its ox | vedclass

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(C) In the extraction of metals,sulphide ores are roasted to convert them into metal oxides because it is thermodynamically easier to reduce metal oxi

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The enthalpy of formation of $CO_2$ is more than that of $CS_2$

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(C) In the extraction of metals,sulphide ores are roasted to convert them into metal oxides because it is thermodynamically easier to reduce metal oxides than metal sulphides.According to Ellingham diagrams,the reduction of metal oxides by carbon is feasible because the formation of $CO_2$ is more exothermic (more negative $\Delta G_f$) than the formation of $CS_2$.Therefore,the enthalpy of formation of $CO_2$ is more negative than that of $CS_2$,making the reduction of oxides favorable.

$A$ sulphide ore is first converted into its oxide before reduction. This is done because

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