`NaCN` is sometimes added in the froth flotation process as a depressant when `ZnS` and `PbS` minerals are expected because `:`A. `Pb(CN)_(2)` is precipitated while no effect on ZnSB. 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

`NaCN` is sometimes added in the froth flotation process as a depressa

1.	`NaCN` is sometimes added in the froth flotation process as a depressant when `ZnS` and `PbS` minerals are expected because `:`A. `Pb(CN)_(2)` is precipitated while no effect on ZnSB. 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
Answer» Correct Answer - b

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