Question

Which reagent is used for detecting ${\text{Ni}}^{2+}$ ions in solution?

• A. EDTA
• B. Dimethylglyoxime
• C. $\alpha -\text{nitroso}-\beta -\text{naphthol}$
• D. None of the above

Answer 1

The correct option is B Dimethylglyoxime

When dimethylglyoxime is added to a solution along with ammonium hydroxide, the formation of a bright red precipitate indicates the presence of ${\text{Ni}}^{2+}$ ions in solution. This is due to the formation of nickel dimethylglyoxime complex.