Question

Name the depressant which is used to separate ZnS and PbS ores in froth floatation process. 
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Answer 1

Answer:

Sodium cyanide (NaCN).

is used to separate ZnS and PbS ores in froth floatation process.

Answer 2

Explanation:

For example, in order to separate two sulphide ores (ZnS and Pbs), NaCN is used as a depressant. It selectively allows PbS form froth, but prevents ZnS from coming to froth.