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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 while no effect as `ZnS`

B

`ZnS` forms soluble complex `Na_2[Zn(CN)_4]` while `PbS` forms froth

C

`PbS` forms soluble complex `Na_2[Pb(CN)_4]` while `ZnS` forms froth

D

`NaCN` is never added in froth flotation process

Text Solution

Verified by Experts

The correct Answer is:
B
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