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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 ` gets precipitated without any effect on ZnS

B

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

C

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

D

` Zn(CN)_2 ` gets precipitated without any effect on PbS.

Text Solution

Verified by Experts

The correct Answer is:
B
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