Question
Sulphide ores are converted to oxides before reduction. This is explained on the basis of which of the following?
A.
Sulphides cannot be reduced easily while oxides can be reduced easily.
B.
Sulphides decompose on reduction hence they are first converted to oxides.
C.
Sulphide ores have higher melting points than oxides.
D.
Oxides are more stable than sulphides hence easy to reduce.
Answer :
Sulphides cannot be reduced easily while oxides can be reduced easily.
Solution :
Thermodynamically based on Ellingham diagram it is observed that sulphides cannot be reduced easily as compared to oxides.