Question

Sulphides 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 1

Answer: (A)

Sulphides cannot be reduced easily while oxides can be reduced easily.

Answer 2

Thermodynamically based on Ellingham

diagram it is observed that sulphides cannot be reduced easily as compared to oxides.