A) potassium cyanide
B) sodium cyanide
C) silver cyanide
D) sodium sulphide
Correct Answer: B
Solution :
Sodium cyanide,\[NaCN,\]is used as a depressant to separate lead sulphide\[(PbS)\] and zinc sulphide\[(ZnS)\]as it depresses the ability of\[ZnS\]to form froth while does not affect the ability of\[PbS\].You need to login to perform this action.
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