Chemistry - Coordination Chemistry Question with Solution | TestHub

The incorrect match is option C. $\mathrm{Ag}(\mathrm{CN}{)}_2^{-}$ is involved in the extraction of silver and gold (cyanide process), not photography. Photography primarily uses silver halides like AgBr.

Option 1: Vitamin ${\mathrm{B}}_{12}$ (cobalamin) is indeed the antipernicious anaemia factor.

Option 2: $\mathrm{RhCl}(\mathrm{PP}{\mathrm{h}}_3{)}_3$ (Wilkinson's catalyst) is used for the hydrogenation of alkenes.

Option 4: D-penicillamine and desferrioxime-B are chelating agents used to remove excess copper and iron, respectively.