Osmosis is the spontaneous flow through a semi-permeable membrane of

Options

A. A less concentrated solution into more concentrated
B. The solvent form a solution of lower concentration to one of higher concentration
C. Solute particles from a solution of higher concentration to one of lower concentration
D. None of these

Explanation

**Step-by-Step Solution:**

1. **Understanding Osmosis**: Osmosis is a specific type of diffusion that involves the movement of solvent molecules. It is essential to recognize that osmosis refers to the flow of solvent, not solute.

2. **Direction of Flow**: In osmosis, solvent molecules move from a region of low concentration of solute to a region of high concentration of solute. This means that the solvent moves from an area where there are fewer solute particles to an area where there are more solute particles.

3. **Role of Semi-Permeable Membrane**: The movement of solvent occurs through a semi-permeable membrane, which allows only certain molecules (in this case, solvent molecules) to pass through while blocking others (like solute particles).

4. **Defining the Process**: Therefore, osmosis can be defined as the spontaneous flow of solvent molecules from a region of low solvent concentration to a region of high solvent concentration through a semi-permeable membrane.

5. **Identifying the Correct Answer**: Based on the definition, the correct answer to the question is that osmosis is the flow of solvent molecules through a semi-permeable membrane from a region of low solute concentration to a region of high solute concentration.

**Final Answer**: Osmosis is the spontaneous flow of solvent molecules through a semi-permeable membrane from a region of low solute concentration to a region of high solute concentration.

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