Which of the following salts will not give borax bead test ?

Options

A. `Al(NO_(3))_(3)`
B. `CoCl_(2)`
C. `CoC_(2)O_(4)`
D. `K_(2)C_(2)O_(4)`

Answer

To determine which of the given salts will not give a borax bead test, we need to analyze the colors of the compounds listed in the options. The borax bead test is a qualitative analysis method used to detect certain metal ions based on the color of the resulting compound when heated with borax.

### Step-by-Step Solution:

1. **Identify the Salts**: The salts given in the question are:
- Option 1: Al(NO3)3 (Aluminum nitrate)
- Option 2: CuCl2 (Copper(II) chloride)
- Option 3: CuC2O4 (Copper(II) oxalate)
- Option 4: K2C2O4 (Potassium oxalate)

2. **Analyze Each Salt**:
- **Option 1: Al(NO3)3**: This salt is white in color. Since it is not colored, it will not give a borax bead test.
- **Option 2: CuCl2**: This salt is blue in color. Being a colored compound, it will give a borax bead test.
- **Option 3: CuC2O4**: This salt can appear either pink or grey in color. It is also a colored compound and will give a borax bead test.
- **Option 4: K2C2O4**: This salt is white in color. Like Al(NO3)3, it is not colored and will not give a borax bead test.

3. **Conclusion**: Based on the analysis, the salts that will not give a borax bead test are:
- Option 1: Al(NO3)3
- Option 4: K2C2O4

### Final Answer:
The salts that will not give a borax bead test are **Al(NO3)3 and K2C2O4**.

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