8.1. Aldehydes and ketones — Chemistry STD 12 Science — Question

$\mathop {\begin{array}{*{20}{c}}
  {\begin{array}{*{20}{c}}
  {COOH\,\,} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {H - C - OH\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} 
\end{array}} \\ 
  {Br - C - H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {\,\,\,COOC{H_3}} 
\end{array}}\limits_{(I)} $ $\mathop {\begin{array}{*{20}{c}}
  {\begin{array}{*{20}{c}}
  {\,\,\,\,\,\,\,\,COOC{H_3}\,\,} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {H - C - Br\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} 
\end{array}} \\ 
  {HO - C - H\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {\,\,\,\,\,\,\,COOH\,\,\,\,\,\,\,\,} 
\end{array}}\limits_{(II)} $

Statement I : $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ is a homoleptic complex whereas $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+}$is a heteroleptic complex.

Statement II : Complex $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ has only one kind of ligands but $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]^{+}$has more than one kind of ligands.

In the light of the above statements, choose the correct answer from the options given below.

$(I)\, K_4 [Fe(CN)_6]$   $(II)\, K_3[Cr(CN)_6]$   $(III)\, K_3 [Co(CN)_6]$ $(IV)\, K_2[Ni(CN)_4]$

Select the correct answer using the codes given below