Two solutions having same osmotic pressure are called as ……..solution.

Answer

To answer the question, "Two solutions having the same osmotic pressure are called as ……..solution," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Osmotic Pressure**:
- Osmotic pressure is the pressure required to stop the flow of solvent into a solution through a semipermeable membrane. It is a colligative property that depends on the concentration of solute particles in the solution.

2. **Identifying the Types of Solutions**:
- When comparing two solutions, we can categorize them based on their osmotic pressures:
- **Isotonic Solutions**: Solutions that have the same osmotic pressure.
- **Hypertonic Solutions**: Solutions that have a higher osmotic pressure compared to another solution.
- **Hypotonic Solutions**: Solutions that have a lower osmotic pressure compared to another solution.

3. **Defining Isotonic Solutions**:
- If two solutions have equal osmotic pressures (let's denote them as πA and πB), we classify them as isotonic solutions. This means that when these solutions are separated by a semipermeable membrane, there will be no net movement of solvent molecules between them.

4. **Conclusion**:
- Therefore, the answer to the question is that two solutions having the same osmotic pressure are called **isotonic solutions**.

### Final Answer:
Two solutions having the same osmotic pressure are called **isotonic solutions**.