Question:
Given below are two statements :
Statement I :
The identification of $\mathrm{Ni}^{2+}$ is carried out by dimethyl glyoxime in the presence of $\mathrm{NH}_{4} \mathrm{OH}$.
Statement II :
The dimethyl glyoxime is a bidentate neutral ligand.
In the light of the above statements, choose the correct answer from the options given below:
Correct Option: , 3
Solution:
Neutral dimethyl glyoxime does not act as ligand.
When $\mathrm{Ni}^{2+}$ reacts with dimethyl glyoxime in presence of $\mathrm{NH}_{4} \mathrm{OH}$, it produce dimethyl glyoximate then it form rozy red ppt.
$\left.\mathrm{Ni}^{2+}{ }_{\text {(aq) }}+2 \mathrm{dmg}^{-} \rightarrow \underset{\text { Rosyred ppt. }}{\left[\mathrm{Ni}(\mathrm{dmg})_{2}\right.}\right]$