Solveeit Logo
Login

Question

Question: In presence of PbS and ZnS in a mineral the froath floatation process require NaCN because-...

In presence of PbS and ZnS in a mineral the froath floatation process require NaCN because-

A

ZnS goes into the solution as soluble complex [Zn(CN)4]2–

B

Zn(CN)2 is precipitated

C

PbS forms soluble complex Na2[Pb(CN)4]

D

ZnS forms insoluble complex [Zn(CN)4]2–

Answer

ZnS goes into the solution as soluble complex Zn(CN)<sub>4</sub>Zn(CN)<sub>4</sub>2–

Explanation

Solution

ZnS forms water soluble complex

ZnS + 4 NaCN ® 4Na+ + [Sn(CN)4]2– + S–2

Water soluble