Question

$N{i}^{2+}$, in traces, can be tested using :

• A. sodium nitroprusside
• B. dimethyl glyoxime
• C. ammonium sulphocyanide
• D. potassium ferrcoyanide

Answer 1

The correct option is B dimethyl glyoxime

$N{i}^{2+}$ in traces, can be tested using dimethyl glyoxime.

$N{i}^{2+}$ reacts with DMG to form cherry red precipitate of $\left[Ni\right(DMG{)}_2{]}^{2+}$

$N{i}^{2+}+DMG\to \underset{cherryredppt.}{\left[Ni\right(DMG{)}_2{]}^{2+}}$