AIPMT 2007 Physics and Chemistry Paper

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Question : 74 of 100

Marks: +1, -0

Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true :

Roasting of the sulphide to the oxide is thermodynamically feasible
Carbon and hydrogen are suitable reducting agents for metal sulphides
The ∆1Gθ of the sulphide is greater than those for CS2 and H2S
The ∆1Gθ is negative for roasting for sulphide ore to oxide

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