Question

The sample is dissolved in hot con. $HCl$ and add few drops of $N{H}_{4}OH$ followed by dimethyl glyoxime soln. We get a rosy red precipitate. The presence of which ion is confirmed :

• A. ${Mn}^{2+}$
• B. ${Cu}^{2+}$
• C. ${Ni}^{2+}$
• D. ${Pb}^{2+}$

Answer 1

The correct option is C ${Ni}^{2+}$

Addition of alcoholic solution of dimethylglyoxime to ammoniacal solution of Ni(ll) gives rosy red precipitate.