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How to solve this problem- Which of the following works as depressant in the separation of ZnS and PbS.

Which of the following works as depressant in the separation of ZnS and PbS.

  • Option 1)

    AgCl

  • Option 2)

    BaCl

  • Option 3)

    NaCN

  • Option 4)

    CuSO_4

 
Answers (1)
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As we learnt

 

Depressants -

 

These reagents depress the flotation property and help in the separation of different sulphide ores present in a mixture

- wherein

NaCN is the example of depressant

 

 ZnS+4NaCN\rightarrow Na_{2}\left [ Zn\left ( CN \right ) _{4}\right ]+Na_{2}S

 


Option 1)

AgCl

Option 2)

BaCl

Option 3)

NaCN

Option 4)

CuSO_4

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