Which is incorrect

Options

A. Rate of diffusion is directly proportional to concentration
B. Rate of diffusion is inversely proportional to distance
C. Diffusion is movement of perticles from low to high electrochemical potential
D. Example of diffusion is opening of scent or ammonia in one corner

Answer

To determine which statement about diffusion is incorrect, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Understanding Diffusion**:
- Diffusion is defined as the movement of molecules from an area of higher concentration to an area of lower concentration. This process continues until equilibrium is reached.

2. **Analyzing the Statements**:
- **Statement A**: "Rate of diffusion is directly proportional to concentration."
- This statement is **correct**. As the concentration gradient increases, the rate of diffusion also increases.

- **Statement B**: "Rate of diffusion is inversely proportional to distance."
- This statement is **correct**. The shorter the distance the molecules have to travel, the faster the diffusion occurs.

- **Statement C**: "Diffusion is movement of particles from low to high electrochemical potential."
- This statement is **incorrect**. Diffusion actually occurs from a region of high electrochemical potential to a region of low electrochemical potential.

- **Statement D**: "Example of diffusion is opening of sand or ammonia in one corner."
- This statement is **correct**. When ammonia is released in one corner of a room, it diffuses throughout the space, moving from a region of high concentration to lower concentration.

3. **Conclusion**:
- The incorrect statement among the four provided is **Statement C**.

### Final Answer:
The incorrect statement is: "Diffusion is movement of particles from low to high electrochemical potential."

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