A perfect partition between osmotically active system and pure water in physical condition can be formed by a

Options

A. Semipermeable membrane
B. Selective permeable membrane
C. Impermeable membrane
D. Freely permeable membrane

Answer

To solve the question, "A perfect partition between osmotically active system and pure water in physical condition can be formed by a," we need to understand the concept of osmosis and the types of membranes involved.

### Step-by-Step Solution:

1. **Understanding Osmosis**:
- Osmosis is the movement of water molecules from an area of lower solute concentration (dilute solution) to an area of higher solute concentration (concentrated solution) through a semi-permeable membrane.

2. **Role of Semi-Permeable Membrane**:
- A semi-permeable membrane allows certain molecules or ions to pass through while blocking others. In the case of osmosis, it allows water molecules to pass but restricts the movement of solutes (like salts or sugars).

3. **Identifying the Correct Type of Membrane**:
- The question asks for a "perfect partition" between an osmotically active system (which has solutes) and pure water. For this partition to be effective, it must allow water to move while preventing solutes from passing through.

4. **Evaluating Options**:
- **Selective Permeable Membrane**: This allows some substances to pass while blocking others. This is a characteristic of semi-permeable membranes, but the term "selective" is often used interchangeably.
- **Impermeable Membrane**: This would not allow any substances to pass, which does not facilitate osmosis.
- **Freely Permeable Membrane**: This would allow all substances, including solutes, to pass through, which is not suitable for creating a partition between an osmotically active system and pure water.

5. **Conclusion**:
- The correct answer is that a perfect partition can be formed by a **semi-permeable membrane**. This type of membrane is essential for osmosis as it allows water to move while preventing solute movement.

### Final Answer:
A perfect partition between osmotically active system and pure water in physical condition can be formed by a **semi-permeable membrane**.