Select the salt whose aqueous solution is not green:

Options

A. `FeSO_(4)`
B. `CrCl_(3)`
C. `NiCl_(2)`
D. `MnCl_(2)`

Explanation

To solve the question of selecting the salt whose aqueous solution is not green, we will analyze the colors of the aqueous solutions of the given salts step by step.

### Step-by-Step Solution:

1. **Identify the salts given in the question**:
- FeSO4 (Iron(II) sulfate)
- CrCl2 (Chromium(II) chloride)
- NiCl2 (Nickel(II) chloride)
- MnCl2 (Manganese(II) chloride)

2. **Determine the color of the aqueous solution for each salt**:
- **FeSO4**: The aqueous solution of Iron(II) sulfate (FeSO4) is known to be dark green in color.
- **CrCl2**: The aqueous solution of Chromium(II) chloride (CrCl2) is also green in color.
- **NiCl2**: The aqueous solution of Nickel(II) chloride (NiCl2) is green in color as well.
- **MnCl2**: The aqueous solution of Manganese(II) chloride (MnCl2) is light pink in color.

3. **Compare the colors**:
- FeSO4: Dark green
- CrCl2: Green
- NiCl2: Green
- MnCl2: Light pink

4. **Identify the salt whose solution is not green**:
- From the analysis, we see that MnCl2 (Manganese(II) chloride) is the only salt whose aqueous solution is light pink, which is not green.

5. **Conclusion**:
- The salt whose aqueous solution is not green is **MnCl2 (Manganese(II) chloride)**.

### Final Answer:
The salt whose aqueous solution is not green is **MnCl2 (Manganese(II) chloride)**.

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