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Q.

Di methyl glyoxime is used for the test of ____ in alkaline medium

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a

Zn

b

Mn

c

Co

d

Ni

answer is D.

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Detailed Solution

The reagent dimethylglyoxime (DMG) is a very famous organic compound used in qualitative analysis.

In alkaline medium, DMG reacts specifically with nickel (Ni²⁺ ions).

When DMG is added to a solution containing Ni²⁺ (and made alkaline with ammonia), it forms a bright red-pink colored chelate complex called nickel dimethylglyoximate.

This reaction is highly selective, meaning it works almost only for nickel, so it is a confirmatory test for Ni²⁺.

 

Answer: Dimethylglyoxime is used for the test of Nickel (Ni²⁺) in alkaline medium.

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