MCQ
The most stable complex among the following is
- A${K_3}[Al{({C_2}{O_4})_3}]$
- B$[Pt{(en)_2}]C{l_2}$
- C$Ag{(N{H_3})_2}Cl$
- ✓${K_2}(Ni(EDTA)]$
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${\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+},\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+},\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+},}$
${\left[\mathrm{Cu}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+},\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}}$
