NTA Abhyas NEET2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice
You are given a mixture of Z n S and P b S . The two compounds can be separated by
Options
- Afroth flotation on adding N a C N
- Belectromagnetic separation
- Chandpicking
- Dleaching with N a C N
Correct answer
A. froth flotation on adding N a C N
Step-by-step solution
Sometimes, it is possible to separate two sulphide ores by adjusting proportion of oil to water or by using depressants. For example, in case of an ore containing Z n S and P b S , the depressant used is N a C N . It selectively prevents Z n S from coming to the froth but allows P b S to come with the froth.