An ammoniacal metal salt solution gives a brilliant red precipitate on addition of dimethylglyoxime. The metal ion is: (A) Co2+ (B) Fe2+ (C) Ni2+ (D) Cu2+

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Question

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

(A) Co2+
(B) Fe2+
(C) Ni2+
(D) Cu2+

Prashant Kotian · Accepted Answer

Correct answer: C. Ni+2 + dmg + NH4OH  [Ni(dmg)2]+ NH4+ + H2O red ppt

💡 Solution & Explanation