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During the extraction of `Ag` and `Au` using a `KCN` solution, cyanide ions react with metal ions as
A. a reducing agent
B. a complexing agent
C. and oxidizing agent
D. a lewis base

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Best answer
Correct Answer - B::D
`CN^(ѳ)` is strong ligand so act as complexing agent that’s why a Lewis base.

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