Which of the following upon shaking with water will not form a true solution?

Options

A. Alum
B. Common salt
C. Albumin
D. Sucrose

Explanation

To determine which of the following substances will not form a true solution upon shaking with water, we need to understand what a true solution is and analyze each option accordingly.

### Step-by-Step Solution:

1. **Define True Solution**:
- A true solution is a homogeneous mixture where the solute particles are uniformly distributed within the solvent. The size of the solute particles in a true solution is less than 1 nanometer.

2. **Analyze the Options**:
- **Option 1: Alum**:
- Alum is a hydrated double salt. When alum is shaken with water, it dissolves and forms a true solution. Therefore, this option is not correct.

- **Option 2: Common Salt (Sodium Chloride)**:
- Common salt dissolves in water and forms a true solution as well. The particles are uniformly distributed in the water. Thus, this option is also not correct.

- **Option 3: Albumin**:
- Albumin is a type of protein. When mixed with water, it forms a colloidal solution, which is a heterogeneous mixture. The particles are not uniformly distributed, so this option is correct as it does not form a true solution.

- **Option 4: Sucrose**:
- Sucrose (table sugar) dissolves in water and forms a true solution. The particles are uniformly distributed, making this option incorrect.

3. **Conclusion**:
- The substance that does not form a true solution upon shaking with water is **Albumin** (Option 3).

### Final Answer:
**Option 3: Albumin**