NTA Abhyas NEET2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice
Which of the following factors is of no significance for roasting sulphide ores to the oxides and not subjecting the sulphide ores to carbon reduction directly?
Options
- ACO 2 is more volatile than CS 2
- BMetal sulphides are thermodynamically more stable than CS 2
- CCO 2 is thermodynamically more stable than CS 2
- DMetal sulphides are less stable than the corresponding oxides
Correct answer
B. Metal sulphides are thermodynamically more stable than CS 2
Step-by-step solution
Metal sulphides are more stable than corresponding oxides and that is why they are more difficult to extract metal from sulphide ores. To make the extraction easy and economical , first these sulphides are converted into corresponding oxides and from these oxides metal is easily extracted by reducing them with carbon.