When a solid solute is added to the solvent, some solute dissolves and its concertration increases in solution. This process is known as

Options

A. saturation
B. dissolution
C. unsaturation
D. crystallisation

Answer

To solve the question regarding the process that occurs when a solid solute is added to a solvent, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding the Components**:
- Identify the components involved: a solid solute and a solvent. The solute is the substance being dissolved, and the solvent is the substance in which the solute dissolves.

2. **Process of Dissolution**:
- When the solid solute is added to the solvent, it begins to dissolve. This means that the solute particles separate and disperse throughout the solvent.

3. **Increase in Concentration**:
- As the solute dissolves, the concentration of the solute in the solution increases. Concentration refers to the amount of solute present in a given volume of solution.

4. **Definition of the Process**:
- The overall process of a solute dissolving in a solvent is known as "dissolution." This term encompasses the entire process of the solute becoming part of the solution.

5. **Conclusion**:
- Therefore, when a solid solute is added to a solvent and it dissolves, the process is referred to as "dissolution."

### Final Answer:
The process is known as **dissolution**.

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