Complexes formed in the cynide process are: (a) \( \left[\mathrm{Au}(\mathrm{CN})_{2}\right]^{-}...

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Complexes formed in the cynide process are:
(a) \( \left[\mathrm{Au}(\mathrm{CN})_{2}\right]^{-} \)
(b) \( \left[\mathrm{Ag}(\mathrm{CN})_{2}\right]^{-} \)
(c) \( \left[\mathrm{Cu}(\mathrm{CN})_{4}\right]^{2-} \)
(d) \( \left[\mathrm{Zn}(\mathrm{CN})_{4}\right]^{2-} \)
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