1.

Complex formation for cyanide method is used for the extraction ofA. CuB. FeC. HgD. Ag

Answer» Correct Answer - D
`Ag_(2)S + 4NaCN rarr 2Na[Ag(CN)_(2)] + Na_(2) S`
`2Na[Ag(CN)_(2)]+ Zn rarr 2 Ag + Na_(2)[Zn(CN)_(4)]`.


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