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  • An ammoniacal metal salt solution gives a brilliant red precipitate on addition of dimethylglyoxime. The metal ion is:Option: 1 <img alt="\mathrm{Co}

An ammoniacal metal salt solution gives a brilliant red precipitate on addition of dimethylglyoxime. The metal ion is:

Option: 1

\mathrm{Co}^{2+}


Option: 2

\mathrm{Ni}^{2+}


Option: 3

\mathrm{Fe}^{2+}


Option: 4

\mathrm{Cu}^{2+}


Answers (1)

best_answer

\mathrm{NiCl}_2+\mathrm{NH}_4 \mathrm{OH}+\mathrm{dmg} \rightarrow \underset{\text{Rosy red ppt}}{\left[\mathrm{Ni}(\mathrm{dmg})_2\right]}

So, \mathrm{Ni}^{2+} is the metal ion. 
 

Posted by

manish painkra

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