OMG is used for the qualitative chemical analysis of

Options

A. `NI^(+2)`
B. `CI^(+3)`
C. `Fe^(+2)`
D. `Mn^(+2)`

Answer

To solve the question regarding the qualitative chemical analysis of nickel ions (Ni²⁺) using dimethylglyoxime (DMG), we can break down the solution into clear steps:

### Step-by-Step Solution:

1. **Identify the Purpose of DMG**:
- Dimethylglyoxime (DMG) is a reagent used in qualitative analysis to detect the presence of nickel ions (Ni²⁺).

2. **Reaction Setup**:
- Prepare a solution containing nickel(II) chloride (NiCl₂) and add ammonium hydroxide (NH₄OH) to it. This step is crucial as it creates the right environment for the reaction to occur.

3. **Addition of DMG**:
- Add dimethylglyoxime to the prepared nickel solution. The chemical structure of DMG is (CH₃)₂C(NOH)₂, which can form a complex with nickel ions.

4. **Observation of Precipitate Formation**:
- Upon adding DMG, a red-colored precipitate will form if nickel ions are present in the solution. This precipitate is a complex of nickel with DMG.

5. **Chemical Reaction**:
- The reaction can be summarized as follows:
\[ \text{Ni}^{2+} + 2 \text{DMG} + 2 \text{OH}^- \rightarrow \text{Ni(DMG)}_2 \downarrow + 2 \text{H}_2\text{O} \]
- The product, Ni(DMG)₂, is the red precipitate that confirms the presence of nickel ions.

6. **Conclusion**:
- If a red precipitate is observed, it indicates the presence of nickel ions in the solution. Therefore, the answer to the question is that DMG is used for the qualitative analysis of Ni²⁺ ions.

### Final Answer:
Dimethylglyoxime (DMG) is used for the qualitative chemical analysis of nickel ions (Ni²⁺).

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