wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

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

A
The G0f of the sulphide is greater than those for CS2 and H2S.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
The G0f is negative for roasting of sulphide ore to oxide.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Roasting of the sulphide to the oxide is thermodynamically feasible.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Carbon and hydrogen are suitable reducing agents for metal sulphides.
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D Carbon and hydrogen are suitable reducing agents for metal sulphides.
The standard free energies of formation (G0f) of most of the sulphides are more negative than those of CS2 and H2S. Hence, neither carbon nor hydrogen can reduce metal sulphides to metal. The standard free energies of formation of oxides are much lower than those of SO2. Therefore, oxidation of metal oxides is thermodynamically favourable. Hence sulphide is thermodynamically favourable. Hence sulphide ore is roasted to the oxide before reduction.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Roasting
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon