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NaCN is sometimes added in the froth flo...

`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 whhile no effect on `ZnS`.

B

`ZnS` forms solubel complex `Na_(2)[Zn(CN)_(4)]` while `PbS` forms froth.

C

`PbS` froms soluble complex `Na_(2)[Pb(CN)_(4)]` while `ZnS` forms froth.

D

`NaCN` is never added in froth floatation process.

Text Solution

Verified by Experts

The correct Answer is:
2
`ZnS+4NaCNrarrNa_(2)[Zn(CN)_(4)]+Na_(2)S`
`PbS+NaCNrarr`No such complex formation
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