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When ZnS and PbS minearls are present to...

When ZnS and PbS minearls are present together, then NaCN is added to separate them in the froth floatation process as a depressant, because :

A

`Pb(CN)_(2)` is precipitated while no effect on ZnS

B

ZnS forms soluble complex `Na_(2)[Zn(CN)_(4)]`

C

PbS forms soluble complex `Na_(2)[Pb(CN)_(4)]`

D

They cannot be separated by adding NaCN

Text Solution

Verified by Experts

The correct Answer is:
a,b
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