A) Sphalerite
B) Argentine
C) Galena
D) Copper pyrite
Correct Answer: B
Solution :
[b] Argentite Argentite \[[A{{g}_{2}}S]\] being a low grade are is preferably extracted by leaching with NaCN. Leaching of silver: \[4\,Ag+8NaCN+{{O}_{2}}+2{{H}_{2}}O\to \] \[4\,Ag+[Ag{{(CN)}_{2}}]+4NaOH\] \[or\,\,A{{g}_{2}}S+4NaCN\to 2Na[Ag{{(CN)}_{2}}]+N{{a}_{2}}S\] \[(soluble\,complex)\]You need to login to perform this action.
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