MCQ
Among the following the coloured compound is
- A$\mathrm{CuCl}$
- B$\mathrm{K}_3\left[\mathrm{Cu}(\mathrm{CN})_4\right]$
- ✓$\mathrm{CuF}_2$
- D$\left[\mathrm{Cu}\left(\mathrm{CH}_3 \mathrm{CN}\right)_4\right] \mathrm{BF}_4$
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$A.$ Chlorophyll - Co
$B.$ Water hardness - EDTA
$C.$ Photography $-\left[ Ag ( CN )_2\right]^{-}$
$D.$ Wilkinson catalyst - $\left[\left(P h_3 P\right)_3 R h C l\right]$
$E.$ Chelating ligand - D - Penicillamine
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