The membrane which allows only water molecules to pass through it and no solute molecules is called

Options

A. semipermeable membrane
B. selectively permeable
C. impermeable membrane
D. permeable membrane

Answer

To solve the question, "The membrane which allows only water molecules to pass through it and no solute molecules is called," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Membranes**:
- There are different types of membranes based on their permeability to substances. The question is asking specifically about a membrane that allows only water to pass through.

2. **Evaluate the Options**:
- **Semi-permeable membrane**: This type of membrane allows certain molecules, particularly water, to pass while blocking others, specifically solute molecules.
- **Selectively permeable membrane**: This membrane allows all solvent molecules (including water) and some specific solute molecules to pass through. Therefore, it does not fit the criteria of allowing only water.
- **Impermeable membrane**: This type does not allow any molecules, whether solvent or solute, to pass through. This is not the answer since we need a membrane that allows water to pass.
- **Permeable membrane**: This allows all molecules, both solvent and solute, to pass through without restriction. This also does not fit the criteria.

3. **Identify the Correct Answer**:
- Based on the definitions and characteristics of the membranes, the only type that allows only water molecules to pass through while blocking solute molecules is the **semi-permeable membrane**.

4. **Conclusion**:
- Therefore, the correct answer to the question is **semi-permeable membrane**.

### Final Answer:
The membrane which allows only water molecules to pass through it and no solute molecules is called a **semi-permeable membrane**.

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